Technical Test SSC JE: Electrical Engineering (EE)- 5 - Electrical Engineering (EE) MCQ

The chemical effect of current is used in

Unit of deflection sensitivity of a CRO is

A 400A, 50 Hz, 30 HP, three phase IM is drawing 50A current at 0.8 p.f. lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction andwindage losses are 1050 W and core loss are 1200 W. The air gap power of the motor will be

The number of armature parallel paths in a two pole D.C. generator having duplex lap winding is

The series field of a short shunt D.C. generator is excited by

The meter constant of a single phase 230V induction watt hour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10A of 0.9 pf lagging will be

Electrostatic voltmeters are particularly suitable for measuring high voltages because the construction is simplified due to

A load is connected to an active network. At the terminal to which the load is connected R_n=10W and V_th = 60V. Then the maximum power supplied to the load is

The resonant frequency of the given series circuit is

What is the correct sequence of the following type of ammeters and voltmeters with increasing accuracy ?

1. Moving iron

2. Moving coil permanent magnet

3. Induction

Select the correct answer using the codes givenbelow

Compared with a solid conductor of the same radius, corona appears on a stranded conductor at a lower voltage, because stranding

If the separation between the three phase of a transmission line is increased then

The mobility of electrons in a material is expressed in units of

The impurity commonly used for realizing the base region of a silicon n-p-n transistor is

A derive whose characteristics are very close to that of an ideal current source is

A galvanometer can be converted into an ammeter by connecting

The delta connected generator shown in the figure has phase voltage of 200 V on no load.If connection of one of the phase is reversed then resultant voltage across the mesh will be

Wooden cross arms are used for supporting

A moving iron instrument gives full scale deflection with 10 mA has a resistance of 3W. Determine the resistance to be connected in series so as to enable it to read up to 100V

The rotor of a single phase induction motor

An insulating material ring has mean diameter of 100 mm, cross sectional area of 200 mm².It is wound with 200 turns of insulated wire. Another coil of 1000 turns is wound on the top of the first coil. Then what is the mutual inductance ?

In forward mode NPN BJT, if we increase the voltage V_cc, the collector current increases

During electric arc welding as the thickness of the metal to be welded increases

In fluorescent tube, a ballast resistance is connected in series with the choke

The current through 120 ohm resistor in the circuit shown in the figure below is

For the circuit shown below, what is the voltage across the current source I_s ?

To determine the losses of an alternator, it is driven by