Applied Electricity quick practice

Question 1 of 10

An open circuit has

A. a short B. zero resistance C. very high current D. a break so no current flows

Question 2 of 10

The resistance of a wire is doubled when its

A. area is doubled B. length is doubled C. length is halved D. temperature falls

Question 3 of 10

A Zener diode is used mainly for

A. voltage regulation B. amplification C. light emission D. storage

Question 4 of 10

The frequency of the mains supply in Ghana is

A. 50 Hz B. 60 Hz C. 100 Hz D. 240 Hz

Question 5 of 10

The rule used to find the direction of force on a current-carrying conductor in a motor is

A. Fleming's right-hand rule B. Fleming's left-hand rule C. Lenz's law D. Ohm's law

Question 6 of 10

An AC supply has a frequency of 50 Hz. What is its period?

A. 0.02 s B. 50 s C. 0.2 s D. 0.5 s

Question 7 of 10

Identical cells connected in parallel give

A. a higher voltage B. the same voltage but a longer life C. zero voltage D. a lower current capacity

Question 8 of 10

An earth leakage circuit breaker protects people from

A. electric shock B. high bills C. power cuts D. lightning only

Question 9 of 10

The SI unit of electric charge is the

A. ampere B. coulomb C. volt D. ohm

Question 10 of 10

A person receiving an electric shock should first be

A. disconnected from the supply by switching off B. pulled by the bare hand C. splashed with water D. left alone

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New set of questions

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.

Past questions, worked solutions and curriculum-mapped study material for JHS and SHS students and teachers in Ghana.

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