Download 1 Electric current originates from which part of an atom? A. nucleus

1 Electric current originates from which part of an
atom?
A. nucleus
A. Area of cross section
B. Resistivity
C. Length
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B. entire atom acting as a unit
D. Temperature
C. positively charged protons
6 Voltage is a form of:
D. negatively charged electrons
A. Kinetic energy
B. Potential energy
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2 Which of the following is true of electrical forces?
A. Like charges attract, unlike charges repel.
B. Electrical forces are produced by electrical
charges.
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C. Positive and negative charges can combine to
produce a third type
D. Electrical forces are weaker than gravitational
forces.
3 How can electric charge be established?
B. Atoms from which electrons have been removed
produce positive electric charge.
C. Both A and B.
D. Neither A nor B.
D. None of the above
7 The ratio of voltage and electrical current in a
closed circuit:
A. Decreases
B. Increases
C. Remains constant
D. Varies
8 The curve representing Ohms law is a:
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A. Electrons can be removed from atoms and
accumulated to produce a negative charge.
C. both Potential and Kinetic energy
A. Friction between the comb and hair transfers
electrons.
B. Induction between the comb and hair.
D. Contact between the comb and hair results in a
charge.
5 The resistance of the wire varies inversely as:
C. Parabola
D. Hyperbola
9 Ohm’s law states which relationship between
electrical quantities?
A. volts = current times resistance
B. volts = current divided by amps
C. volts = coulombs divided by charge
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C. Deduction between the comb and hair.
B. cosine function
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4 When a person combs her hair, static electricity is
sometimes generated by what process?
A. Linear
D. volts = resistance times charge
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15 Give the name of materials which contain lots of
free electrons.
A. voltage
A. insulators
B. current
B. conductors
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10 Resistance is a measure of a material’s opposition
to
C. electric force.
C. semiconductors
D. movement of protons.
D. None of the above
11 Electric current is defined as a flow of
16 Which of the following is not a type of energy
source?
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A. electric charge in units of volts per s.
B. protons in units of protons per s.
C. electric charge in units of coulomb per s.
A. generator
B. solar cell
C. rheostat
D. battery
17 When two positively charged materials will
placed close together then :
12 What are the basic components of a simple
electric circuit?
A. it will repel each other
A. energy source
B. connecting wires
C. switch
D. All the above
13 To produce a electric current what is the
requirement?
A. A voltage source
C. An electric field moving through a conductor
D. Any of the above
14 Which of the following is not an electrical
classification of materials?
A. Semiconductors
C. it will attract each other
D. None of the above
18 Electrons in the outer orbit are called
A. shells
B. valences
C. nuclei
D. All the above
19 A series circuit consists of three resistors with
values of 140 , 250 , and 220 . The total resistance is
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B. A source of energy that moves charges
B. become negative
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D. electrons in units of electrons per s.
A. 330
B. 610
C. 720
D. None of the above
20 When will be the current flows in a circuit?
A. a switch is closed
B. a switch is opened
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B. Semi-insulators
C. switch is either open or closed
C. Insulators
D. None of the above
D. Conductors
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28 The instrument used for measuring electric
current is :
21 The unit of electrical charge is the
A. coulomb
B. volt
C. joule
D. watt
A. galvanometer B. ammeter
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22 When one of three series resistors is removed
from a circuit and the circuit is reconnected, the
current
A. increases by half
B. increases
C. decreases by half
D. None of the above
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23 If a 24 V and a 10 V battery are series opposing,
the total voltage is
C. voltmeter
D. potentiometer
29 The amount of work done in joules, when one
unit electric charge moves from one point to another
point in an electric circuit is called :
A. resistance
B. potential difference
C. current
D. charge
30 The resistance of material depends on :
A. temperature
B. length of conductor
24 A series circuit consists of three resistors. Two
resistors are 1.4 k each. The total resistance is 12 k.
The value of the third resistor
C. area of cross-section
D. All the above
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A. 14 V B. 10 V C. 24 V D. 34 V
A. 92 k ohm
B. 920 ohm
C. 9200 ohm
D. None of the above
A. 0.017 ohm
B. 58.82 ohm
C. 58.82 kilo ohm D. None of the above
26 The SI unit of power is_________.
A. Joule B. Ampere C. Watt D. Ohm
B. current increases
C. current remains the same
C. V a 1/I
D. None of the above
32 The relation between potential difference (V) and
current (I) was discovered by :
A. Volt
B. Ohm C. Newton D. Ampere
33 What is the most commonly used conductor in
electronics?
A. copper
C. gold
B. aluminum
D. silver
34 Give the name of components which is designed
to oppose the flow of current.
A. capacitor
B. resistors
C. inductor
D. EMF
35 What are the different parts of a rheostat?
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D. current decreases
B. V a I2
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27 According to Ohm’s law, if voltage increases and
resistance stays the same:
A. resistance decreases
A. V a I
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25 A 430 resistor, a 210 resistor, and a 100 resistor
are all in parallel. The total resistance is :
31 The relation between potential difference (V) and
current (I) is :
A. only wiper
B. wiper and resistor track
C. armature
D. oly resistor track
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36 The SI unit of electric current is :
A. ohm B. volt
C. ampere
44 Positive electrode is known as__________.
D. watt
37 The rate of flow of an electric charge is known as :
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A. electric potential
B. electric resistance
C. electric current
D. None of the above
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B. Very low resistance
C. Double the resistance
D. Resistance equal to the circuit
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39 Resistance ‘R’ of a wire of length “L” is given by
the relation:
C. R=?L/A
D. None of the above
C. Anode tube
D. Cathode tube
45 When the pointer of an analog ohmmeter reads
close to zero, the resistor being measured is:
46 Which of the following is a six basic forms of
energy ?
A. Infinite resistance
B. R=L/A
B. Anode
A. open B. reversed C. shorted D. overheated
38 An ideal voltmeter would have an:
A. R=L/?a
A. Cathode
A. light, sun, magnetic, chemical, electrical, and
mechanical
B. electrical, mechanical, light, heat, magnetic, and
chemical
C. potential, sun, light, chemical, electrical, and
mechanical
D. electrical, mechanical, sun, heat, chemical, and
light
47 The word work means that:
A. volt
A. energy has been transferred
B. Joule C. Ampere D. Watt
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40 The unit of emf is ___________.
41 If a source of EMF is traversed from negative to
positive terminal the potential change is:
A. Negative
B. no energy has been transferred
C. it is inversely related to energy
D. None of the above
B. Positive
48 Kilowatt – hour is the unit of:
D. None of the above
42 The resistance of a conductor is directly
proportional to :
A. Length B. Area C. volt D. current
A. Voltmeter
B. Ammeter
C. Rheostat
D. All the above
A. power
B. potential difference
C. Force
D. electrical energy
49 If resistance decreases, then current will:
A. increase
B. double
C. decrease
D. Constant
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43 Which of the following laboratory apparatus is
used during the verification of Ohm’s law ?
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C. Positive and Negative Both
50 The resistance of a conductor is inversly
proportional to its :
A. volt
B. Length C. Area D. None of the above
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51 Which type of test equipment is used to measure
resistors?
B. ammeter
C. voltmeter
D. wattmeter
57 A current of 3A flows through a conductor whose
ends are at a p.d of 6V. Calculate the resistance of
the conductor ?
52 Why battery is used in the circuit ?
A. measure current
A. ohm B. 0.5 ohm C. 2 ohm
B. maintain a potential difference
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53 What will be the equivalent e.m.f of the battery if
three cells each of e.m.f ‘E’ are joined in parallel ?
B. E= 0
C. 3E
D. E /3
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A. E
54 Electric cell is a device which converts energy
from ………… to …………..
A. elctrical to chemical
B. elctrical to mechanical
D. mechanical to elctrical
A. insulators
B. conductors
C. semiconductors
D. None of the above
59 How many terminal electric cell consists of ?
A. one
B. three C. two
D. four
60 Electrical conductors are materials which contain:
A. only positive charge
B. movable electric charge
C. only negative charge
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C. chemical to elctrical
D. 12 ohm
58 Rubber is material included in :
C. oppose the current
D. measure potential
C. decrease the magnitude of current only
D. None of the above
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A. ohmmeter
B. increase or decrease the magnitude of current
55 For the verification of Ohm’s law ammeter and
voltmeter should be connected in :
B. ammeter should be connected in parallel and
voltmeter in series
C. ammeter and voltmeter should be connected in
series
A. protecting from shock
B. provide the current
C. oppose the current
D. None of the above
62 In series combination, resistance increases due to
increase in :
A. Area of cross-section
C. Length
B. Voltage
D. Current
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D. ammeter should be connected in series and
voltmeter in parallel
61 Insulator material is used for :
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A. ammeter and voltmeter should be connected in
parallel
D. None of the above
56 Why rheostat is used in the circuit ?
63 Conductance is expressed in terms of :
A. increase the magnitude of current
A. mho. B. ohm / m
C. ohm D. mho / m
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64 If there are three resistances each of 2 ohm and
generate the effective resistance of 3 ohm so how
will the connection of the three resistances in the
circuit?
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A. A parallel combination of two resistances and one
in series
B. A series combination of two resistances and one
in parallel
C. Three are in series
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D. Three are in parallel
65 What happen when ammeter connected in
parallel ?
A. open circuited
A. 60 W
B. 150W
C. Both A and B.
D. None of the above
70 If resistance of a wire is r ohms and wire is
stretched to double its length, then what is its
resistance ?
A. r
B. 2 r
C. 4 r
D. r/2
B. closed circuited
71 In parallel combination, resistance decreases due
to increase in
D. None of the above
A. Area of cross-section
B. Voltage
C. Length
D. current
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C. short circuited.
69 If there is two bulb i.e 150W bulb and 60W bulb
so which has more resistance ?
66 If two unequal resistors connected in parallel
then
A. The voltage is same in both resistor
72 Which of the following is bad conductor of
electricity ?
B. The current is same in both resistor
A. Gold
B. plastic
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C. The voltage is large in one of the resistor
D. The current is large in one of the resistor
C. silver D. copper
73 The device which easily closes or opens an
electric circuit is called as:
A. switch
B. cell
C. key
D. bulb
74 A small wire present inside the bulb is called as:
A. aluminum
B. wood
A. conductor
C. plastic
D. cloth
68 What does a switch do ?
A. oppose the current
B. open and closed the circuit
D. store the energy
C. Insulators
B. Filament
D. None of the above
75 If one of the resistors in a parallel circuit is
removed, the total resistance will be :
A. doubles B. decreases C. increasesD. constant
76 All good conductors have high :
A. resistance
B. conductance
C. voltage
D. None of the above
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C. provide current
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67 Which of the following is good conductor of
electricity ?
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84 When a battery is connected to a series circuit, it
delivers current based only upon:
77 A short circuit has:
A. no resistance B. no conductance
C. low current
A. primary/secondary difference
D. None of the above
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78 Combination of three resistances in series then it
is given as:
B. the polarity connections
C. total resistance
A. R1 + R2 + R3
B. 1/R1 + 1/ R2 + 1/ R3
D. average resistance
C. R1 x R2 x R3
D. None of the above
85 The symbol given for ohm is
A. O
B. ?
A. power
B. Resistance
C. ohm
D. None of the above
C. Current
D. Voltage
86 Why are copper wires used as connecting wires?
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79 A parallel circuit is also used as a divider for:
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80 What happens to current and resistance if the
voltage doubles?
A. Current doubles and resistance doubles
B. Current doubles and resistance is halfed.
C. Current remains the same and resistance doubles.
D. Current doubles and resistance remains the same.
B. infinity
C. negligible
D. None of the above
B. Half
C. same
D. increases
83 Which is considered to be the common reference
for a parallel circuit?
B. Resistance
C. Power
D. Voltage
A. Negative terminal to positive terminal
B. In both the directions
C. Positive terminal to negative terminal
D. None of the above
88 A current of 2A flows through a 12V bulb then
calculate the resistance ?
A. 6 ohm
B. 0.16 ohm
C. 32 ohm
D. ohm
89 A cell or battery maintained a difference in
potential between its two electrodes by the :
A. mechanical processes
B. electrical processes
C. chemical processes
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A. Current
87 Direction of conventional current is from:
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82 If the resistance total in a series circuit doubles,
current will:
A. Doubles
C. High resistivity D. Both A and B
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81 What should be the resistance of an Voltmeter ?
A. zero
A. low resistivity B. low conductivity
D. None of the above
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98 If two resistors have the same voltage drop in a
series circuit, it means:
A. un-ohmic conductors.
A. voltage has doubled
B. non-ohmic conductors.
B. equal value
C. low-ohmic conductors.
C. unequal value
D. zero- ohmic conductors.
D. not determine
91 The cylindrical container of electric cell is made
up of which material.
99 What should be the resistance of an ammeter?
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90 The conductors which do not obey ohm’s law is
called as:
A. copper
B. aluminum
C. iron
D. Zinc
92 Conductivity is the ____________ of resistivity.
B. Reciprocal
C. equal
D. None of the above
93 1 Ampere is given as:
A. 1 C x 1s
B. 1 C/1s
C. 1s / 1 C
D. None of the above
94 On which of the following device there is marked
of plus and minus sign.
A. ammeter
B. voltmeter
C. battery
D. All the above
B. V = W / Q
C. V = Q / W
D. W = V/ Q
96 A complete electric circuit is called as:
B. short
C. closed
D. complete
97 How many terminals an electric bulb consists of ?
A. 2
B. 4
C. 3
D. 1
D. None of the above
100 How is the potential difference maintained
across the ends of a conductor?
A. by connecting rheostat
B. by connecting it to a battery or a dry cell
C. by connecting resistance
D. by connecting switch
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A. open
C. negligible
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95 Which oft following relation is correct for voltage,
work done and charge ?
A. V = W x Q
B. infinity
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A. opposite
A. zero
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Answers
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1 Ans: D 2 Ans: B 3 Ans: C 4 Ans: A 5 Ans: A 6 Ans: B 7 Ans: C 8 Ans: A 9Ans: A 10 Ans: B 11 Ans: C 12 Ans: D 13
Ans: D 14 Ans: B 15 Ans: B16Ans: C 17 Ans: A 18 Ans: B 19 Ans: B 20 Ans: A 21 Ans: A 22 Ans: B 23 Ans: A 24 Ans: C
25 Ans: B 26 Ans: C 27Ans: B 28 Ans: B 29 Ans: B 30 Ans: D 31 Ans: A 32 Ans: B 33 Ans: A 34 Ans: B 35 Ans: B
36 Ans: C 37 Ans: C 38 Ans: A 39 Ans: C 40 Ans: A 41Ans: B 42 Ans: A 43 Ans: D 44 Ans: B 45 Ans: C 46 Ans: B
47 Ans: A 48 Ans: D 49 Ans: A 50 Ans: B 51Ans: A 52 Ans: B 53Ans: A 54 Ans: C 55 Ans: D56 Ans: B57 Ans: C
58 Ans: A59 Ans: C60 Ans: B61 Ans: A62 Ans: C63 Ans: A64 Ans: A65 Ans: C67Ans: A68 Ans: B69Ans: A70Ans: C
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71 Ans: A72 Ans: B73 Ans: A74 Ans: B75 Ans: C76 Ans: B77 Ans: A78 Ans: A79 Ans: C80 Ans: D81Ans: B82Ans: B
83 Ans: D84 Ans: C85Ans: A86 Ans: A87 Ans: C88 Ans: A89 Ans: C90Ans: B91 Ans: D92 Ans: B93 Ans: B94 Ans: D
95Ans: B96Ans: C97 Ans: A98 Ans: D99 Ans: A100 Ans: B
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AIIMS,CBSE,AIPMT, AFMC,Bio.Tech & PMT, Contact :- 9438559863, Mail at :- [email protected],www.ibiokaare.com,compiled by AKB