Basic Electrical

The unit for inductance is ___________

• Ohm

• Henry

• Farad

• Ampere

The resistivity of the conductor depends on

• area of the conductor.

• length of the conductor.

• type of material.

• none of these.

Which of the following is not an expression power?

• P=VI

• P=I²R

• P=V²/R

• P=I/R

Conductance is expressed in terms of

• ohm / m

• m / ohm

• mho / m

• mho

The resistance of a 100 W, 200 V lamp is

• 100 ohm

• 200 ohm

• 400 ohm

• 1600 ohm

By using two wattmeter method, power can be measured in

• 3 - phase, 2 - wire system

• 3 - phase, 3 - wire system

• 3 - phase, 4 - wire system

• All of these

Which among the following sentences is correct?

• Lenz’s law is used to find the direction of induced current

• Fleming’s right hand rule is used to find the direction of induced current

• Fleming’s left hand rule is used to find the direction of force

• All of these

According to Kirchoff’s voltage law,

• The algebraic sum of all the e.m.f’s in the circuit is zero

• Algebraic sum all the voltage drops in the circuit is zero

• Algebraic sum of e.m.f’s plus algebraic sum of voltage drops is equal to zero

• All of these

Alternating voltage can be generated by

• By rotating a coil in a magnetic field

• By rotating a magnetic field within a stationary coil

• Either (a) or (b)

• Neither (a) or (b)

Energymeter is a / an

• Indicating instrument

• Integrating instrument

• Recording instrument

• All of these