10B Revision 1-3

2. The coil rotates in the ___ direction when viewed from the end closest to the brushes.

Using a battery with a larger potential difference will cause the rotation speed of the coil to ___ . 

A stronger magnetic field will cause the coil to rotate ___ . 

A voltage across the primary coil causes a voltage across the secondary coil because the changing magnetic field induces an ___ across the secondary coil.

The voltage across the secondary coil will be larger than that across the primary coil if the number of turns in the secondary coil is ___ than the primary coil.

 If the input to the primary coil is 2400 V and 100 A, and the output voltage of the secondary coil is 40,000 V, the current in the secondary coil is ___ A.

Transmitting electrical energy at high voltage is cheaper because there is less power loss and ___ cables can be used. 

The needle of the voltmeter deflects when the magnet is inserted into the solenoid because a changing ___ field induces an electromotive force (e.m.f.). 

Inserting the magnet more slowly will cause a ___ deflection on the voltmeter because the rate of change of the magnetic field is reduced. 

When the magnet is withdrawn from the solenoid, the voltmeter needle deflects in the ___ direction.