GATE Electronics & Communications Practice Paper -1

Test Preparation on GATE Electronics & Communications Practice Paper -1

1.

Just as a voltage amplifier signal voltage a power amplifier.

1amplifier power
2amplifier signal
3converts the signal ac power into DC power
4converts a dc power into useful AC power

2.

Cross over distortion in class - B push-p amplifiers:

1Is due to transistor operating near saturation region
2Can be eliminated by operating them in class operation
3Occurs because two power transistors do not exactly matching parameters
4Always occurs in low signal are

3.

If the load p.f. is 0.866, then the average p.f. the v-bank is

1`0.886
2`0.75
3`0.51
4`0.65

4.

AT-T connection has higher ratio of utilization that n a V ? V connection only when

1Identical transformers are used
2Load power factor is leading
3Load power factor is unity
4Non-identical transformers are used

5.

A commercial power supply has a voltage regulation of:

1`1%
2`5%
3`20%
4`50%

6.

Which stage is of a d.c. power supply uses zener diode

1Rectifier
2Voltage divider
3Filter
4Regulator

7.

Which rectifier requires 4 diodes?

1half wave rectifier
2full wave rectifier
3bridge type rectifier
4Voltage quadrupler

8.

The advantage of dynamic RAMs over static RAMs is

1Lower power consumption
2Higher power consumption
3Higher packing density
4Lower packing density

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