UP polytechnic Lecturer (EE) Quiz 31

Calculate the voltage gain for the OP-amp shown in figure.

Which one of the following statement is wrong?

Hysteresis motor can be used in which of the following ?

A dc generator running at 750 rpm generates an emf of 220V. The percentage increase in the flux per pole to generate 250V at 700 rpm would be

Damping used in hot wire instrument is

A digital voltmeter has a read out range from 0 to 99 counts, the resolution is ?

A circuit consists of two parallel resistor of 8kΩ each connected in series with a 0.5μF capacitor. The time constant of the circuit is

In Nuclear power plant which material is/are used of coolant?

An overcurrent relay having a current setting of 125% connected to a supply circuit through a current transformer of ratio 500/1. The pick up value is

A solenoid has 1000 turns wound over a length of 0.2m. The value of inductance of solenoid is 8 μH. When the number of turns is 2000 and the length is 0.4m then the new inductance will be