WorksheetsElectricity & Motor
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What happens when current flows through a wire?
a)
a) A device that produces sound
b)
b) A substance that attracts iron
c)
c) A type of battery
d)
d) A form of light
2.
The Right Hand Grip Rule is used to determine:
a)
a) It produces light
b)
b) It produces a magnetic field
c)
c) It cools down
d)
d) Nothing happens
3.
If current flows towards you, the magnetic field lines are:
a)
a) Clockwise
b)
b) Counter-clockwise
c)
c) Straight
d)
d) Non-existent
4.
A solenoid is:
a)
a) A single straight wire
b)
b) A coil of wire
c)
c) A type of battery
d)
d) A magnet
5.
Why does a solenoid act like a magnet when current flows?
a)
a) Because it has iron inside
b)
b) Because the coiled wire strengthens the magnetic field
c)
c) Because it produces light
d)
d) Because it has no resistance
6.
What happens if two parallel wires carry current in the same direction?
a)
a) They repel
b)
b) They attract
c)
c) They explode
d)
d) Nothing happens
7.
How can you increase the strength of a solenoid’s magnetic field?
a)
a) Use thinner wire
b)
b) Add an iron core
c)
c) Decrease the current
d)
d) Uncoil the wire
8.
What does the Right Hand Grip Rule help determine?
a)
a) Current direction
b)
b) Magnetic field direction around a wire
c)
c) Voltage drop
d)
d) Resistance
9.
If current in a wire flows away from you, the magnetic field direction is:
a)
a) Clockwise
b)
b) Counter-clockwise
c)
c) Upwards
d)
d) Downwards
10.
Why do two parallel wires with opposite currents repel?
a)
a) Their magnetic fields cancel out
b)
b) Their magnetic fields add up in the same direction
c)
c) They produce heat
d)
d) They stop conducting current
11.
A wire carries current into the page (⨀)
a)
a) Clockwise
b)
b) Counter-clockwise
c)
c) Radial outward
d)
d) No field is produced
12.
If you reverse the current direction in a solenoid, what happens to its magnetic poles?
a)
a) North and South switch
b)
b) Poles disappear
c)
c) Poles get stronger
d)
d) Nothing changes
13.
A student wraps a wire around a nail and connects it to a battery
a)
a) Electromagnet
b)
b) Permanent magnet
c)
c) Superconductor
d)
d) Insulator
14.
How would doubling the current in a wire affect its magnetic field?
a)
a) Field strength doubles
b)
b) Field strength halves
c)
c) Field direction reverses
d)
d) No effect
15.
A long straight wire and a loop both carry 1A current
a)
a) The straight wire
b)
b) The loop
c)
c) Both are equal
d)
d) Cannot be determined
16.
What happens if you place a compass near a current-carrying wire?
a)
a) Needle aligns parallel to the wire
b)
b) Needle aligns perpendicular to the wire
c)
c) Needle points randomly
d)
d) Compass stops working
17.
To make the strongest electromagnet, you should:
a)
a) Use a short, thick wire with low current
b)
b) Use many coils of thin wire with high current and an iron core
c)
c) Use a single loop with no core
d)
d) Use aluminum wire instead of copper
18.
If two solenoids attract each other, their currents must be:
a)
a) Flowing in the same direction
b)
b) Flowing in opposite directions
c)
c) Alternating rapidly
d)
d) Zero current
19.
A magnetic field is strongest:
a)
a) Far from the wire
b)
b) Close to the wire
c)
c) At the wire's midpoint
d)
d) Only inside the wire
20.
What device uses the principle that current produces a magnetic field?
a)
a) Light bulb
b)
b) Electric motor
c)
c) Resistor
d)
d) Battery
100 %
