Which is the best conductor of electricity _______________?
Which is the best conductor of electricity _______________?
A. Iron
B. Silver
C. Copper
D. Carbon
Which is the best conductor of electricity _______________?
A. Iron
B. Silver
C. Copper
D. Carbon
An instrument which detects electric current is known as_____________?
A. voltmeter
B. rheostat
C. wattmeter
D. galvanometer
Electric pressure is also called________?
A. resistance
B. power
C. voltage
D. energy
A resistance having rating 10 ohms, 10 W is likely to be a__________?
A. metallic resistor
B. carbon resistor
C. wire wound resistor
D. variable resistor
Which of the following statement is true________________?
A. A galvanometer with low resistance in parallel is a voltmeter
B. A galvanometer with high resistance in parallel is a voltmeter
C. A galvanometer with low resistance in series is an ammeter
D. A galvanometer with high resistance in series is an ammeter
The voltage induced in an inductor is represented as,
A. product of its inductance and current through it.
B. ratio of its inductance to the current through it.
C. ratio of the current through it to its inductance.
D. product of its inductance and rate of change of current through it.
The instantaneous voltage across the inductor is expressed as the product of inductance and a rate of change of current through it as it doesn’t allow any certain change of current through it. Voltage induced in an inductor is written as
Which of the following has no units?
A. Permeability
B. Moment of a magnet
C. Magnetic susceptibility
D Permittivity
Magnetic susceptibility is the degree to which a material is magnetized by an external magnetic field, hence in the SI system it is dimensionless.