A resistance having rating 10 ohms, 10 W is likely to be a__________?
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
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With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________?
A. 10 W
B. 20 W
C. 40 W
D. 60 WThe voltage induced in an inductor is represented as,
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
The condition for the validity under Ohm’s law is that_______________?
The condition for the validity under Ohm’s law is that_______________?
A. resistance must be uniform
B. current should be proportional to the size of the resistance
C. resistance must be wire wound type
D. temperature at positive end should be more than the temperature at negative endTwo lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
A. 100 W lamp will glow brighter
B. 40 W lamp will glow brighter
C. Both lamps will glow equally bright
D. 40 W lamp will fuseWhich of the following quantities remain the same in all parts of a series circuit ____________?
Which of the following quantities remain the same in all parts of a series circuit ____________?
A. Voltage
B. Current
C. Power
D. ResistanceWhich of the following has no units?
Which of the following has no units?
A. Permeability
B. Moment of a magnet
C. Magnetic susceptibility
D PermittivityMagnetic susceptibility is the degree to which a material is magnetized by an external magnetic field, hence in the SI system it is dimensionless.