Explore topic-wise MCQs in Electrical Engineering.

"The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed".The above statement is associated with

The dissipation factor of a good dielectric is of the order of

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because

Two plates of a parallel capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

Which of the following is not a vector ?

The capacitance of a capacitor is not affected by

A dielectric material must be

If three 10 uF capacitors are connected in parallel, the net cararitance is

If three 15 uF capacitors are connected in series, the net capacitance is

The units of capacitance are

For making a capacitor, it is better to select a dielectric having

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is

If the sheet of a bakelite is inserted between the of an , the capacitance will

The ability of charged bodies to exert force on 6ne another is attributed to the existence of

The electric field at a point situated at a distance d from straight charged conductor is

The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be

The force between two charges is 120 N. If the distance between the charges is doubled, the force will be

One newton metre is same as

Conductance : mho ::

Which of the following can have negative temperature coefficient ?

When a voltage of one volt is applied, a circuit allows one microampere current to flow through it.The conductance of the circuit is

If, R and t are the current, resistance and time respectively, then according to Joule's law heat produced will be proportional to

A thermistor has

With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals

The number of electrons in the outer most orbit of carbon atom is

The ratio of mass of proton to that of electron is nearly

Voltage dependent resistors are usually made from

All good conductors have high

are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

An open resistor, when checked with an ohm-meter reads

A rheostat differs from potentiometer in the respect that it

Which of the following statement is correct ?

The condition for the validity under Ohm's law is that

When current flows through heater coil it glows but supply wiring does not glow because

Which of the following materials has the least resistivity ?

Temperature co-efficient of resistance is expressed in terms of

A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be

Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be

. 3 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners

Which method can be used for absolute measurement of resistances ?

Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be

A substance whose molecules consist of dissimilar atoms is called

A field of force can exist only between

When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will

Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes

Sparking occurs when a load is switched off because the circuit has high

Switching of a lamp in house produces noise in the radio. This is because switching operation produces

For testing appliances, the wattage of test lamp should be