Why should a resistance be introduced in a circuit in series deliberately ?
(A) to increase current
(B) to decrease current
(C) to control current
(D) just to give a good look to circuit
If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
(A) 3600C
(B) 7200C
(C) 1C
(D) 2C
Which one of the following materials is useful for making bulb filaments ?
(A) constantan
(B) nichrome
(C) copper
(D) tungsten
In the following figure, the terminal potential is ___________________ ?
(A) zero
(B) 2V
(C) 12V
(D) 36V
Specific resistance of a wire____________________?
(A) will depend on its length
(B) will depend on its radius
(C) will depend on the type of material of the wire
(D) will depend on none of the above
There are three bulbs of 60W 100W and 200W which bulb has thickest filament ?
(A) 100W
(B) 200W
(C) 60W
(D) all
Circuit which gives continuously varying potential is called _______________________?
(A) complex network
(B) wheat stone bridge
(C) potential divider
(D) all of above
Reciprocal of resistivity is called__________________?
(A) resistance
(B) inductance
(C) conductivity
(D) flexibility
Resistance of an ideal insulator is __________________?
(A) infinite
(B) zero
(C) finite
(D) depends upon nature
An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?
(A) 2KWh
(B) 20KWh
(C) 6KWh
(D) 12KWh