A potentiometer wire of length 10 m and resistance 10 Ω per metre is connected in series
A potentiometer wire of length 10 m and resistance 10 Ω per metre is connected in series with a resistance…
7 years ago
Current Electricity
The drift speed of electrons in copper wire of diameter and length l is v.
The drift speed of electrons in copper wire of diameter and length l is v. If the potential difference across…
7 years ago
A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes
A steady current of 1.5 amp flows through a copper voltmeter for 10 minutes. If the electrochemical equivalent of copper…
7 years ago
Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series
Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source.…
7 years ago
The resistance of an ammeter is 13Ω and its scale is graduated for a current
The resistance of an ammeter is 13Ω and its scale is graduated for a current upto 100 amps. After an…
7 years ago
Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms
Three resistances P,Q,R each of 2Ω and an unknown resistances S form the four arms of a Wheatstone bridge circuit.…
7 years ago
Which one of the following electrical meter has the smallest resistance?
Which one of the following electrical meter has the smallest resistance? Options (a) Ammeter (b) Milliammeter (c) Galvanometer (d) Voltmeter…
7 years ago
A steady current is passing through a linear conductor of non-uniform cross-section.
A steady current is passing through a linear conductor of non-uniform cross-section. The net quantity of charge crossing any cross-section…
7 years ago
Heat produced in a resistance according to which law?
Heat produced in a resistance according to which law? Options (a) Thomson's law of heating (b) Faraday's law (c) Joule's…
7 years ago
Masses of three wires of copper are in the ratio of 1:3:5 and their lengths
Masses of three wires of copper are in the ratio of 1:3:5 and their lengths are in the ratio of…
7 years ago