Electronics and Communication Engineering - Networks Analysis and Synthesis

6.
An RL impedance function can also be realized as
RC impedance function
RC admittance function
LC impedance function
LC admittance function
Answer: Option
Explanation:

RL impedance function and RC admittance have similar forms.


7.
A step voltages is applied to RLC series circuit having R = 2 Ω, L = 1 H and C = 1 F. The transient current response will be
over damped
critically damped
under damped
any of the above depending the magnitude of voltage
Answer: Option
Explanation:

. Since R = Rcr, critically damped response.


8.
Class C solid insulators should not be used above 100°C.
True
False
Answer: Option
Explanation:

For class C insulators temperature limit is 180°C.


9.

Assertion (A): Superposition theorem can be used to find the output of a full wave rectifier excited by sinusoidal signal sources of different frequencies connected in series.

Reason (R): Superposition theorem is valid for all linear systems.

Both A and R are true and R is correct explanation of A
Both A and R are true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
Answer: Option
Explanation:

Sinusoidal sources of different frequencies cannot be used for a rectifier circuit.


10.
The current through a 1 mH inductance is i(t) = 2.56 x 10-2 - 4 x 103 t for 2 ≤ t ≤ 20 μ sec. The voltage across the inductor is
4
8
0
8 x 103
Answer: Option
Explanation:

1 x 10-3 (2.56 x 10-2 - 4 x 103t)

= 1 x 10-3 x 4 x 103 4 volt.