With rise in temperature the resistance of pure metals______________?
With rise in temperature the resistance of pure metals______________?
A. increases
B. decreases
C. first increases and then decreases
D. remains constant
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Electric current passing through the circuit produces_____________?
Electric current passing through the circuit produces_____________?A. magnetic effect
B. luminous effect
C. thermal effect
D. chemical effect
E. all above effectsAn electric filament bulb can be worked from____________?
An electric filament bulb can be worked from____________?
A. D. C. supply only
B. A. C. supply only
C. Battery supply only
D. All aboveThe 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 endHow many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
A. 10
B. 60
C. 600
D. 12001 Ampere current means flowing of 1 Coulomb charge per second. That means 10 A current in 1 minute or 60 seconds implies 10 × 60 = 600 coulombs.
The substances which have a large number of free electrons and offer a low resistance are called____?
The substances which have a large number of free electrons and offer a low resistance are called____?
A. insulators
B. inductors
C. semi-conductors
D. conductorsThree 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open_________________?
A. there will be heavy current in the main line
B. rest of the two bulbs will not light
C. all three bulbs will light
D. the other two bulbs will light