Electronic Devices Mock Tests

A Zener diode is primarily used as a:

A Zener diode with breakdown voltage 5.6 V is used in a voltage regulator circuit. The input voltage varies from 10 V to 15 V. If the series resistor is 500 Ω, the range of Zener current is:

A Zener diode with breakdown voltage of 6 V is used as a voltage regulator. The input voltage varies from 10 V to 16 V. If the load current is 5 mA, the value of series resistance required is:

A p-n junction diode is connected in series with a resistor R = 100 Ω and a battery of emf 5 V. The barrier potential of the diode is 0.7 V. The current in the circuit is:

A Zener diode with breakdown voltage 6 V is used as a voltage regulator in a circuit with a supply voltage of 10 V and a series resistor of 1 kΩ. The Zener diode is connected in parallel with a load resistor of 2 kΩ. The current through the Zener diode is:

A p-n junction diode is forward biased when:

A transistor is used in common emitter mode as an amplifier. If β = 100 and the base current changes by 10 μA, the change in collector current is:

A transistor has a current gain β = 100. If the base current changes by 10 μA, the change in collector current is: