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RRB JE 2019: EDC Quiz 4

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Question 1

A n type semi-conductor has _______ conductivity at 0 °K temperature.

Question 2

The conductivity σ as a function of 1/T, where T is the temperature, for a semiconducting material varies as shown in the figure. Using this information, state whether a resistance made from intrinsic semiconductor will have

Question 3

A peak detector comprises a capacitor and an ideal diode and an ac source in series. Which of the following is true of the circuit.

Question 4

In a full wave rectifier circuit with centre tap transformer, if voltage between one end of secondary winding and centre tap is 300V peak, then PIV (peak inverse voltage) is

Question 5

In a half wave rectifier output of secondary transformer is 117 V rms  ac then average dc is
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Feb 28ESE & GATE EC