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Applied Electricity

Applied Electricity · Quick practice · answer shown after each question

A.C. theory

Question 1 of 10

Question 1 of 10

Impedance is measured in

Question 2 of 10

Question 2 of 10

The opposition of a capacitor to alternating current is

Question 3 of 10

Question 3 of 10

In a purely inductive circuit, current

Question 4 of 10

Question 4 of 10

In a purely capacitive circuit, current

Question 5 of 10

Question 5 of 10

A circuit draws 10 A at 240 V with a power factor of 0.8. The true power is

Question 6 of 10

Question 6 of 10

Capacitive reactance of a 100 μF capacitor at 50 Hz is about

Question 7 of 10

Question 7 of 10

Inductive reactance increases when frequency

Question 8 of 10

Question 8 of 10

The frequency of an a.c. supply with period 0.02 s is

Question 9 of 10

Question 9 of 10

The r.m.s. value of an a.c. with peak 100 V is about

Question 10 of 10

Question 10 of 10

Apparent power of 5 kVA at power factor 0.6 gives a reactive power of

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