The time at which rate of rise of recovery voltage is maximum.
Find the voltage Vab
for the circuit shown below,
The full load copper-loss and iron loss of a transformer are 3200 W and 2000 W respectively. The copper-loss and iron loss at one-fourth load will be respectively
Which of the following expression is true for transformer?
For the three coupled coil in figure calculate the total inductance
Which of the following is a measure of the flow of electric charge over time?
Which Device is used to measure Electric Charge?
As the load on a transformer is increased, the core losses
________ is also known as Inverter.
A good insulating material should not posses
The unit of Luminance or Brightness is
Find the current for t > 0. When at t = 0 switch is closed? Before t = 0 switch is open for a long time?
An SCR is a device having
In a 4-pole wave wound DC motor there are 400 armature conductor which run at a constant speed of 1200 rpm. If the back EMF developed is 240 V, then what will be the operating flux in DC motor?
Hysteresis loss in transformer depends on.
If the Supply voltage in an induction motor is reduced by 5%, by what percentage the maximum torque is increased or decreased?
A 2000/200 V 1-ϕ two winding transformer having the % impedance is 8%. Now it is connected as auto transfere for stepping up the voltage from 2000 to 2200 V Find the % impedence of auto transformer?
The active and reactive powers of an inductive circuit are 60 W and 80 VAR respectively. The power factor of the circuit is:
The breakdown strength or electrostatic stress in the air around the conductor when corona occurs is
A 1 mA ammeter has a resistance of 100 Ω. It is to be converted to a 1 A ammeter. The value of shunt resistance is