01․ What will be the rms value of rectangular wave with amplitude 10 V?

RMS value means, root mean square value of a wave. A rectangular voltage wave has constant amplitude in both positive and negative direction. Hence the mean value and its amplitude will be identical. Therefore square root of square of the mean value of amplitude is same as amplitude of the wave.

02․ The rms value of sinusoidal voltage wave V = 200sinω

_{0}tThe peak value of given voltage wave is 200 V.

03․ If one cycle of AC waveform occurs every millisecond, the frequency will be

One cycle of AC waveform occurs every millisecond means 1000 cycles of that waveform occur in one second. The numbers of cycles of waveform per second is the frequency of that waveform.

04․ If emf in a given circuit is given by e = 100 sinω

_{0}t, then maximum value of voltage and frequency will beThe emf equation is e = 100 sinω

_{0}t ........... (1) Again the general form of emf equation is e = V_{m}sin2πft ........... (2) Where, V_{m}is the voltage amplitude and f is the frequency. Comparing equations (1) and (2) we get,05․ The value of supply voltage for 400 W, 4 Ω load is

Where, V is supply voltage and W is wattage rating of the lamp.
Here, W = 400 Watts and R = 4 Ω.

06․ Say A point has an absolute potential of 40 V and point B has an absolute potential of - 10 V, then what will be the value of V

_{BA}? V

_{BA}is defined as V_{B}- V_{A}= -10 - 40 = - 50 V.07․ The rms value of the voltage U(t)= 3 + 4cos(3t)

08․ In the figure, the potential difference between points P and Q is

Applying KCL at P, V

_{P}= 4.8V Applying KCL at Q, V_{Q}= 10.8V Therefore, potential difference between P and Q is 4.8V-10.8V = -6V.09․ A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be _____________ V.

10․ What is represented by the hypotenuse of impedance triangle?

Impedance triangle means the right angle triangle formed by the vectors representing the resistance drop, reactance drop and the impedance drop of the circuit carrying an alternating current.

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