Download Electricity and Magnetism Quiz

Electricity and Magnetism Quiz
6. Which of these circuits are parallel circuits?
1. What do these symbols show?
A
a cell and a bulb
B
a cell and a switch
C
a bulb and a switch
B X and Z only
D
a switch and a motor
C Y and Z only
2. Which instrument would you use to measure
current?
A an ammeter
B a cell
C a motor
D a voltmeter
A X and Y only
D all of them
7. Which switches must be pressed to make the
bulb X come on?
3. How big would the current be at X, Y and Z?
A 1 and 2 only
A It would be biggest at X and
smallest at Z
B 1 and 3 only
B It would be biggest at Z and
C 2 and 3 only
smallest at X
D all of them
C There would be no current at Y
D It would be the same in all three places
8. Which of these statements is NOT true?
4. Resistance is a way of saying:
A how much electricity is flowing
B how hard it is for the electricity to flow
C how many cells are in a circuit
D how many switches are in a circuit
5. Parallel circuits are used for house lighting:
A so they can all be switched on and off
together
B so you know when one breaks, because all
the others go off
C so they use a bigger current
D so they can all be switched on and off
separately
A the currents at Q and R add up to give the
current at S
B the current is the same at P and S
C the current is the same at Q and R
D the current is the same at P and Q
9. Which statement below is the best definition
of voltage?
A the number of electrons flowing through a
circuit
13. A magnetic field is:
A a piece of ground with lots of iron in it
B the area around a magnet where it can attract
magnetic materials
B the amount of energy in a circuit
C the current flowing through a circuit
D the length of time a battery will last
C the area around a magnet where it can attract
all materials
D the area around a magnet where it repels
magnetic materials
10. If the battery in this circuit is providing 6V,
what will be the reading on voltmeters 2 and 3?
14. Which diagram shows the shape of a magnet
field around a bar magnet?
A
B
C
D
A both 6V
B V2 = 6V and V3 = 3V
C V2 = 3V and V3 = 6V
15. The direction of a magnetic field is from:
D both 3V
A south to north
11. Which of the following materials are
magnetic? (Circle all that apply)
B west to east
A iron
B wood
D east to west
C brass
D nickel
E steel
F cobalt
12. Which of the following statements is NOT
true?
C north to south
16. Which statement about electromagnets is
NOT true?
A they can be switched on and off
A a north pole attracts a south pole
B they need electricity to make them magnetic
B a south pole repels a south pole
C they are made from coils of wire
C a south pole repels a north pole
D they are always magnetic
D a north pole repels a north pole
17. Which of these changes will make an
electromagnet stronger?
20. The shape of the magnetic field around an
electromagnet is:
A use more coils of wire
A like the shape of the field around a bar
magnet
B use a smaller current
C use a wooden core
D use fewer coils of wire
B like the shape of a tree
C straight
D square
18. This diagram shows part of the circuit for an
electric bell.
21. The magnetic field around a straight piece of
wire is:
A parallel to the wire
B square
C circular
D a spiral
When the switch is pressed, which statement is
true?
A the electromagnet will repel the armature
B there is no current flowing through the circuit
C the electromagnet will attract the armature
D the electromagnet will light up
22. An iron core will make an electromagnet
stronger because:
A iron is a strong metal
B iron is a magnetic material
C the coils of wire can be closer together if
there is a core
D the core keeps the coils lined up
19. A magnetic field around a wire is caused by:
A the plastic coating of the wire
B the coils of wire
C an iron core inside the wire
D an electric current flowing through the wire
Answers
1. B
2. A
3. D
4. B
5. D
6. A
7. A
8. D
9. B
10.A
11.A, D, E and F
12.C
13.B
14.C
15.C
16.D
17.A
18.C
19.D
20.A
21.C
22.B
23.