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AC-Voltage 8 Multiple Choice Test

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AC-Voltage 8

Alternating current (AC) is an electric current which periodically reverses direction in contrast to direct current DC which flows only in one direction . This game aims to review the characteristic of AC- Current for Grade 8 students.

NOTE: If the question contains an image, clicking on it will enlarge it for easier viewing. If there is a "More Info" link after the question, clicking it will display additional content related to the question.

The amplitude of the voltage means

In AC voltage the wave form is

If the maximum amplitude(Y) is 3 div, and the vertical sensitivity(Sv) is 5v/div. Then the maximum voltage is

The period (T) of an alternating sinusoidal voltage of Vb =5ms/div, and X= 4div is:

If the period of AC voltage is 20ms, then the frequency is:

The effective value of the maximum voltage of AC voltage is

The wave form in AC voltage is periodic because:

In Lebanon, the effective voltage is 220V and frequency is 50Hz so the period and the maximum voltage are:

If the amplitude of AC voltage increases, then:

AC voltage characterized by

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