Electronics and Communication Engineering - Networks Analysis and Synthesis

21.
In figure, A is ideal ammeter having zero resistance. It will read __________ ampere.
2
2.5
3
4
Answer: Option
Explanation:


22.
Threshold of perception occurs at a current of about 1 mA.
True
False
Answer: Option
Explanation:

Threshold of perception means current which causes small sensation in body.


23.
The current wave shown in figure is applied by a 0.1 F capacitor at t = 0. At t = 0+, the voltage across capacitor is
0
4 V
10 V
20 V
Answer: Option
Explanation:

Voltage across a capacitor cannot change instantaneously.


24.
The average value of delayed full wave rectified sine wave (figure) is
Answer: Option
Explanation:

.


25.
A current increasing at the rate of 1 A/s is passed through 1 F capacitor. At t = 0, i = 0. The charge stored after 1 second is
0.5 C
1 C
2 C
4 C
Answer: Option
Explanation:

q = i dt