Electronics and Communication Engineering - Networks Analysis and Synthesis

46.
A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel. The new bandwidth will be
200 rad/sec
more than 200 rad/sec
less than 200 rad/sec
200 rad/sec or less
Answer: Option
Explanation:

Loading increases bandwidth of parallel tuned circuii.


47.
The correct relation between joules and calories is
calories = joules/4.156
joules = calories/4.156
calories = joules x 107/4.156
joules = calories x 107/4.156
Answer: Option
Explanation:

Calories and joules are related by J, i.e., mechanical equivalent of heat.


48.
The filter in figure, uses ideal op-amp. It is
low pass filter
high pass filter
band pass filter
band stop filter
Answer: Option
Explanation:

Capacitor in shunt gives low pass filter.


49.
For a rectified sinusoidal wave clipped at 0.707 its peak value (figure), the average value is
70.7 V
63.7 V
54 V
15 V
Answer: Option
Explanation:


50.
A voltage v = 100 sin (100 pt + 45°) V is applied to an impedance 10 + j10 ohm. The current is
10 ∠45° A
7.07 ∠45° A
5 ∠45° A
5 ∠0 A
Answer: Option
Explanation:

Z = 200∠45°Ω ;