# AC Fundamentals – 1 – 7

31. The power consumed in a circuit element will be least when the phase difference between the current and voltage is :

(a) 00
(b) 300
(c) 900
(d) 1800

EXPLANATION
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32. A sine wave voltage is applied across a capacitor, when the frequency of the voltage is increased, the current :

(a) increases
(b) decreases
(c) remains the same
(d) is zero

EXPLANATION
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33. How many cycles does a sine wave go through in 10 s when its frequency is 60 Hz ?

(a) 10 cycles
(b) 60 cycles
(c) 600 cycles
(d) 6 cycles

EXPLANATION
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34. The rms current through a 10 kΩ resistor is 5 mA. What is the rms voltage drop across the resistor ?

(a) 10 V
(b) 5 V
(c) 50 V
(d) zero

EXPLANATION
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35. For 100 volts rms value triangular wave, the peak voltage will be :

(a) 100 V
(b) 111 V
(c) 141 V
(d) 173 V

EXPLANATION
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