⚡ELECTRICAL STUDY⚡

Correct ans will be

In the following circuit, determine the current l₁ by using mesh analysis.

The instantaneous values of line current into a delta connected load in any two lines are +2.5 Amp. and -1.25 Amp. the current in the third line at the instant is:

A three-phase synchronous motor connected to ac mains is running at full load and unity power factor. If its shaft load is reduced by half and field current is held constant then its new power factor will be

In a synchronous motor, the breakdown torque is

A three phase, 33 kV oil circuit breaker is rated 1200 A, 2000 MVA, 3s. What is its symmetrical breaking current?

In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is

Calculate the time (in seconds) taken by a series RL circuit having inductance of 0.6 H and resistance of 30 ohms to reach a steady state value.

During discharging of a capacitor of C=1000 μF through a resistance of 1mΩ applied with 50V, the voltage at time constant is:

Which type of lamp holder from the following is fitted directly on the wooden board?

A second-order control system has a damping ratio as 0.6 and natural frequency of oscillation as 11 radian/second. What will be the damped fre- quency of oscillation?

capacitors have the largest capacitance values per volume of element of any capacitor type

The instantaneous power of a balanced three- phase load is 2000 W when phase A is at its peak voltage. What will be the instantaneous power 30° later?

In house wiring, black & green wires indicate

The causal system represented by G(s)=9/(s²+6s+9) is

The electric arc has:

A choke coil of an operating fluorescent lamp is short-circuited. What is the consequence?

Energy stored in an iron cored coil is 500 Joules when carrying a certain current and at that current its copper loss is 1000 W. Time constant of the coil in seconds is: