Current electricity questions | form six Physics

Why choke coil is preferred over resistance to control alternating current?

Answer / Solution

UNSOLVED

Identify two difficulties which would arise when two straight wires are used to transmit
electricity direct from the source to the city station.

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UNSOLVED

Explain what could be done to light a 30 V bulb from a 220 volt A.C. supply?

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UNSOLVED

A series LCR circuit with inductance, ​L=0.12 H, capacitance, C=480​nF and resistance,
R=23Ω is connected to a 230V variable frequency supply. Determine the:

(i) Maximum current flowing in the circuit.
(ii) Source frequency for which the current is maximum.

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UNSOLVED

What is the advantage of using a greater length of potentiometer wire?

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UNSOLVED