Download Intermediate 1/Access 3 Physics

BASIC ELECTRICITY
REVISION HOMEWORK
1.
Draw the circuit symbols for a battery, a lamp and a switch. (use a ruler!)
2.
State the energy changes in a battery, a lamp and a heater and a motor.
3.
a) Draw a circuit containing a battery, a resistor and a bulb all connected
in series.
b) Draw a circuit containing one battery connected to two bulbs in
parallel.
c) Draw a circuit containing two resistors in parallel which are connected
to a bulb and a battery in series.
4.
a) Describe what is meant by a series circuit.
b) Describe what is meant by a parallel circuit.
5.
6.
a) Copy out this circuit and show how an
ammeter should be connected.
b) What would the ammeter be
measuring?
c) What unit would the ammeter
measure in?
a) On your diagram in question 5 add a voltmeter to measure the voltage
across the resistor.
b) What unit would the voltmeter measure in?
BASIC ELECTRICITY
REVISION HOMEWORK
7.
A1
8.
A2
a) State the unit for current
b) If the current through A1
is 5A, what is the current
through A2?
c) What is the current from
the battery?
In the following circuit the supply voltage is 12V.
a) If both bulbs are identical, what is
the voltage across lamp 1?
b) If the current through lamp 1 is 3A,
what is the current through lamp 2?
lamp 1
9.
lamp 2
.
a) In this circuit there are 3A going through
the resistor and 4A through the bulb. What
current is being drawn from the supply.
b) If the supply is 12V, what is the voltage across
i) the resistor and ii) the bulb?
10.
.
Complete the following table
Current (A)
M
Supply
Lamp
Motor
Resistor
3A
1.5A
Voltage (V)
6V
4V
BASIC ELECTRICITY
11.
12.
13.
REVISION HOMEWORK
14.
Draw the circuit symbols for a resistor and a variable resistor.
How is the variable resistor different from an ordinary resistor?
If the resistance of a variable resistor is increased, what happens to the
current?
Give two practical uses of a variable resistor.
13
State the energy changes in a resistor.
14
a) Copy the circuit and add an
ammeter and a voltmeter to
measure the voltage across the
bulb.
b) How would you use these readings to calculate resistance of the bulb?
15.
a) What meter could you use to measure resistance directly?
b) What is the unit of resistance?
16. If the voltage across a bulb is 6V and the current through it is 2A. What is the
resistance of the bulb?
17. Current through a resistor is 10A, and the voltage across it is 230V. What is
the resistance of the resistor?
18. Voltage across a heater is 12V, if current through the heater is 9.5A, what is its
resistance?
19)
A student investigates the resistance of a
piece of metal using the circuit shown. The
student measures the current in the circuit using
an ammeter.
a) State what additional measurement is required
to calculate the resistance of the metal.
b) The ammeter is moved to position X. State
how the ammeter reading compare the original value.
A
Metal
BASIC ELECTRICITY
REVISION HOMEWORK
20)
A student sets up an experiment to investigate the current in and the
voltage across two different resistors (X and Y). The student uses a battery, an
ammeter, a voltmeter and some wires to obtain measurements for each
resistor.
R
Copy and complete the diagram shown above, by labelling the voltmeter and
ammeter, to show how the measurements could be obtained.
The measurements obtained for each resistor are shown in the table.
Use the information in the table to calculate the resistance of resistor Y.