CIE iGCSE Co-Ordinated Science P4.5.1 Electromagnetic induction Exam Style Questions Paper 2
Question
A magnet is moved in and out of a coil and an electromotive force (e.m.f.) is induced. How can the size of the induced e.m.f. be decreased?
(A) Add more turns to the coil.
(B) Move the magnet more quickly.
(C) Move the magnet more slowly.
(D) Turn the magnet around before moving it in and out.
▶Answer/Explanation
Ans :C
Question
There is a current-carrying wire perpendicular to the page.
The direction of the current is into the page.
Which diagram shows the pattern and direction of the magnetic field around the wire?
▶️Answer/Explanation
Ans : A
Question
When a straight conductor moves through a magnetic field, an electromotive force (e.m.f.) is
induced between the ends of the conductor.
Which factor does not affect the magnitude of the induced e.m.f.?
A the length of conductor in the field
B the resistance of the conductor
C the speed at which the conductor moves
D the strength of the magnetic field
▶️Answer/Explanation
Ans : B
Question
Which type of magnet can be switched on and off many times per second?
(A) an electromagnet only
(B) a permanent magnet only
(C) both electromagnets and permanent magnets
(D) neither electromagnets or permanent magnets
▶️Answer/Explanation
Ans: A