A PMMC type voltmeter, having a full-scale reading of 250 V and an internal resistance of 400 kilo-ohms, is connected with the series resistance of 100 kilo-ohms. Calculate the sensitivity of the voltmeter (in Ohms/Volts) 2000 2400 20000 24000 TRUE ANSWER : ? YOUR ANSWER : ?
For a dc machine shunt resistance and armature resistance values are Low and High High and Low High and High Low and Low TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following instrument can measure voltage resistance and current? Voltmeter Multimeter Ammeter Wattmeter TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following statement is TRUE? Kirchhoff’s Law is not applicable to circuits with the distributed elements Kirchhoff’s Law is not applicable to the circuit with the non-Linear resistance. Kirchhoff’s Law is not applicable to the circuit with the passive elements Kirchhoff’s Law is not applicable to the circuit with the non-Linear resistance TRUE ANSWER : ? YOUR ANSWER : ?
In a synchronous motor which loss varies with the load? Copper Loss Windage loss Core Loss Bearing friction Loss TRUE ANSWER : ? YOUR ANSWER : ?
What will be the voltage (in V) across an 8H inductor, when the rate of change of current flowing through it is 0.5A/sec 2 6 4 8 TRUE ANSWER : ? YOUR ANSWER : ?
The main consideration in designing feeders is Voltage Drop Current carrying capacity Transmission Voltage Resistance TRUE ANSWER : ? YOUR ANSWER : ?
If the centrifugal switch does not open at 70 to 80 percent of a synchronous speed of the motor, it would result in None of these Damage to the starting winding Overloading of running winding Damage to the centrifugal switch TRUE ANSWER : ? YOUR ANSWER : ?
In a synchronous Motor, the damping winding is generally used to Reduces the eddy current Prevent hunting and provide starting Torque Reduces the Noise Level Provide starting torque TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is used for the measurement of the insulation resistance? Megger Wattmeter Voltmeter Ammeter TRUE ANSWER : ? YOUR ANSWER : ?