Electronics and Communication Engineering - Networks Analysis and Synthesis

46.
A sinusoidal voltage has peak to peak value of 100 V. The rms value is
50 V
70.7 V
35.35 V
141.41 V
Answer: Option
Explanation:

Peak value = 50 V, rms value = = 35.35 V.


47.
A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be
230 V
0.5 x 230 V
2 x 230V
230/2V
Answer: Option
Explanation:

Peak voltage rating = 2 (rms voltage rating).


48.
The current wave shape shown in figure (1) is applied to a circuit element. The voltage across the element is shown in figure (2). The element is
R
L
C
Semiconductor
Answer: Option
Explanation:

When a current pulse is applied to a capacitor the voltage rises linearly and becomes constant at the end of pulse.


49.
In figure, the current supplied by battery immediately after switching on the circuit is
1 A
4 A
10 A
0
Answer: Option
Explanation:

At t = 0, inductance behaves as open circuit.


50.
RMS value of i(t) = 10[1 + sin (- t)] is
10
10/2
l50
102
Answer: Option
Explanation:

.