ELECTRONIC PRACTICE - Practice Mode

1) What is the peak voltage of 220V rms AC voltage?

310.02 V 311.17 V 312.25 V 315.20 V

Correct Answer: 311.17 V

2) How the input impedance of CRO can be increased?

By adding resistance to CRO probe By adding resistance to trigger level circuit By increasing time/base attenuator switch position By increasing volts/cm attenuator switch position

Correct Answer: By adding resistance to CRO probe

3) What is the frequency of the displayed signal on CRO screen covered by 5 division with a time base setting of 0.2 micro seconds?

1.0 KHz 10.0 KHz 100.0 KHz 1000.0 KHz

Correct Answer: 1000.0 KHz

4) What defect will occur in the radio, if the pulsations are not removed from the input of the rectifier?

Improper tuning No response Humming sound Works with low volume

Correct Answer: Humming sound

5) How does the depletion region behave?

As resistor As insulator As conductor As semi conductor

Correct Answer: As insulator

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