Application Circuits

Which among the following components is not used in an over voltage crowbar protection circuit?

• Resistor

• Capacitor

• Inductor

• SCR

A crowbar is a circuit which is used to protect a_____________?

• voltage sensitive load from excessive dc power supply output voltages

• current sensitive load from excessive dc power supply output voltages

• voltage sensitive load from excessive ac power supply output voltages

• current sensitive load from excessive ac power supply output voltages

Which of the following depends on charging and discharging rate of a capacitor?

• Time constant

• Current

• Power

• Voltage

When a battery is said to be fully charged?

• When voltage is zero

• When the supply voltage is equal to the battery voltage

• When voltage is infinity

• When battery voltage is equal to half the supply voltage

What is the final current while charging a battery?

• High

• Zero

• Infinity

• Low

The output voltage of a charger is

• Less than the output voltage

• Equal to the battery voltage

• higher than the output voltage

A circuit breaker is

• power factor correcting device

• a device to neutralize the effect of transients

• a waveform correcting device

• a current interrupting device.

Presence of power electronic switches makes static switches.

• true

• false