A SQUARE induction coil with a side length 3 cm and 400 windings, is placed
perpendicularly in a uniform magnetic field and then rotated through an angle of 45º
in 0,08 s.
An emf of 7 V is induced in the coil.
11.1 State Faraday’s law of electromagnetic induction in words. (2)
11.2 Calculate the change in the magnetic flux. (3)
11.3 Calculate the magnitude of the magnetic field. (4)
The coil is now rotated through an angle of 45º in 0,05 s.
11.4 How will the induced emf be affected? Write only INCREASE, DECREASE or
STAY THE SAME. (1)
11.5 Explain the answer to QUESTION 11.4. (1)
The north pole of a bar magnet is pushed into a solenoid, as shown in the sketch
below.
11.6 Which pole will be induced at point X? Write only NORTH or SOUTH. (1)
11.7 In which direction will the induced current flow? Write only FROM A TO B or
FROM B TO A. (1)
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