Electronics and Communication Engineering - Networks Analysis and Synthesis

41.
In active filters inductances are divided because they
are always associated with same resistance
are bulky and unsuitable for miniaturization
are non linear
saturate quickly
Answer: Option
Explanation:

Active filters consist of electronic components and have very small size.


42.
Three resistance of 15 Ω each are connected in delta. The resistance of equivalent star will have a value of
15 Ω
5 Ω
5/3 Ω
45 Ω
Answer: Option
Explanation:


43.
The circuit in figure(1) is replaced by that in figure(2). It remains same R0 will be
zero
R
2R
4R
Answer: Option
Explanation:

Net resistance of circuit is 4.571 R and that of circuit is 0.571 R.

Hence R0 be 4R.


44.
In a varistor the v-i graph is linear.
True
False
Answer: Option
Explanation:

The v-i graph, in varistor, is non-linear.


45.
In the circuit of figure the current through 5 Ω resistance at t = 0+ is
4 A
2.5 A
3.1 A
0 A
Answer: Option
Explanation:

Since 3 ohm resistance is short-circuited by capacitor, I = 20/5 A.