Copper and carbon wires are connected in series and the combined resistor is kept
Copper and carbon wires are connected in series and the combined resistor is kept at 0⁰C. Assuming the combined resistance…
7 years ago
Current Electricity
The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C. At 300 K its resistance is 1Ω.…
7 years ago
The electron drift speed is small and the change of the electron is also small
The electron drift speed is small and the change of the electron is also small but still, we obtain large…
7 years ago
A silver wire of radius 0.1 cm carries a current of 2A. If the charge density in silver
A silver wire of radius 0.1 cm carries a current of 2A. If the charge density in silver is 5.86x10²⁸…
7 years ago
An electron revolves in a circle at the rate of 10¹⁹ rounds per second.
An electron revolves in a circle at the rate of 10¹⁹ rounds per second. The equivalent current is (e=1.6x10⁻¹⁹C) Options…
7 years ago
When a wire of uniform cross-section a, length l and resistance R
When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between…
7 years ago
The resistances of the four arms P,Q,R and S in a Wheatstone’s bridge
The resistances of the four arms P,Q,R and S in a Wheatstone's bridge are 10Ω, 30Ω, 30Ωand 90Ω respectively. The…
7 years ago
When 4 A current flows for 2 min in an electroplating experiment,
When 4 A current flows for 2 min in an electroplating experiment, then m gram of silver is deposited. Then…
7 years ago
In India, electricity is supplied for domestic use at 200V. It is supplied at 110 V
In India, electricity is supplied for domestic use at 200V. It is supplied at 110 V in USA. If the…
7 years ago
In a potentiometer experiment, the balancing with a cell is at length 240 cm.
In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a…
7 years ago