Induced currents can be formed in a coil of wire by electromagnetic induction. (a) (i) Describe how to demonstrate the formation of an induced current in a coil of wire. Sketch and label a diagram of the arrangement of the apparatus.

1. (a)(i)Describe how to demonstrate the formation of an induced current in a coil of wire. Sketch and label a diagram of the arrangement of the apparatus.[3]
2. (a)(ii)State two changes to the apparatus that increase the induced current.[2]
3. (a)(iii)1The direction of the induced current is determined by Lenz's Law. State Lenz's Law.[2]
4. (a)(iii)2Describe how Lenz's Law applies in the experiment you described in (a)(i).[2]
5. (b)(i)1An electrical generator supplies power to a distant factory. The factory receives 500kW of electrical power at a voltage of 33kV. Calculate 1. the current in the wires supplying the power,[2]
6. (b)(i)22. the electrical energy supplied to the factory in one hour.[2]
7. (b)(ii)The 33 kV voltage supplied to the factory is very high. Transmitting electrical energy at high voltage reduces energy losses in the transmission lines. Explain why.[2]

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