WorksheetsIGCSE | Magnetism & Electromagnetism
Total questions: 25
Worksheet time: 37mins
Name the effect that causes a coil of current-carrying wire in an electric motor to move.
The electromagnetism effect
The magnetic effect
The motor effect
How does a split ring commutator work?
Swaps the contact evert full turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.
Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil do not experience a force in the same direction.
Swaps the contact evert half turn, so that the left-hand and right-hand arms of the coil always experience a force in the same direction.
Which activity will produce the highest current?
Move the magnet bar into the coil while the coil remains stationery
Move the coil into the magnet bar while the magnet remains stationery
Move the coil and magnet towards each other
Move the coil and magnet away from each other
Calculate potential difference in the secondary coil based on the information given below.
Vp = 240 V
Np = 20
Ns = 125
Vs ?
1500
500
1000
2000
Which of the following is an example of appliance using alternating power source?
Why transformers work with A.C. current but not D.C.
A.C current produces changing magnetic field.
D.C current produces changing magnetic field.
D.C current is weak
A.C current is powerful
This picture is an example of a ________________.
Motor
Generator
Step-up transformer
Step-down transformer
If the transformer shown is 80% efficient, calculate the power at the primary coil.
30W
24W
36.5W
19.2W
What type of device is being shown?
Electromagnet
Electric motor
Electric generator
Electromagnetic Induction
What type of process is shown?
Electromagnet
Electric motor
Electric generator
Electromagnetic induction
What type of device is shown?
Electromagnet
Electric motor
Electric generator
Electromagnetic induction
What type of current is being produced?
Alternating
Direct
The diagram shows a current-carrying wire placed between two magnetic poles. The current is in the direction shown.
What is the direction of the force on the wire?
towards the bottom of the page
towards the top of the page
towards the left-hand side of the page
towards the right-hand side of the page
In the image shown, the dark grey shapes are called:
Brushes
Armatures
Commutators
Windings
A magnetic field is the ________ around a magnet in which the magnetic force acts.
