A current is passed through a resistor for some time. It produces 400 cal of heat in this period. If the current is doubled, how much heat will be produced for the same duration ?

Temperature of a conductor increases by 5^(@) C passing electric current for same time. The increase in its temperature when double current is passed through 1he same conductor the same time is ..... ""^(@)C .

If 1.5 A constant current is passing through a resistance, then the value of rms of current over half period will be ...….

Which option is correct for the following statements A and B? Statement A: The current passing through each resistor is the same in a series combination of resistors. Statement B: The voltage between two ends of each resistor is the same in a parallel combination of resistors.

Assertion: Current is passed through a metallic wire, heating it red. When cold water is poured on half of its portion, then rest of the half portion become more hot. Reason: Resistance decreases due to decrease in tem perature and so current through wire increases.

When current passes through resistor due to its resistive property heat is produced. Error in measurement of resistance, current and time is 1%, 2% and 1% respectively, then what will be percentage error in measurement of heat energy ?

20Omega resistor is connected with the A.C. source of V = 282sin (120 pi t), the current passing through the resistor will be ……..

A long solenoid carring a current, produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is doubled. The new value of the magnetic field is

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is _______ .