International ohm is defined in terms of the resistance of________________?
International ohm is defined in terms of the resistance of________________?
A. a column of mercury
B. a cube of carbon
C. a cube of copper
D. the unit length of wire
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Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as________?
A. 4 : 25
B. 25 : 4
C. 2 : 5
D. 5 : 2The number of electrons in the outer most orbit of carbon atom is___________?
The number of electrons in the outer most orbit of carbon atom is___________?
A. 3
B. 4
C. 6
D. 7Which one of the following does not have negative temperature co-efficient ____________?
Which one of the following does not have negative temperature co-efficient ____________?
A. Aluminium
B. Paper
C. Rubber
D. MicaInsulating materials have the function of______________?
Insulating materials have the function of______________?A. preventing a short circuit between conducting wires
B. preventing an open circuit between the voltage source and the load
C. conducting very large currents
D. storing very high currentsInternal resistance of ideal current source is ?
Internal resistance of ideal current source is ?
A. zero
B. infinite
C. finite
B. 100 ohmsIdeal current source delivers energy at specified current, which is independent on voltage across the load. The internal resistance must become very high to deliver maximum current.
Which is the best conductor of electricity _______________?
Which is the best conductor of electricity _______________?
A. Iron
B. Silver
C. Copper
D. Carbon