Recent questions tagged heating effect of a current

+1 vote

1 answer

An accumulator battery whose e.m.f. is 12 V and internal resistance 0.8Ω. is connected, in turn,

asked Apr 3, 2019 in JEE by kratos

+3 votes

1 answer

Area of cross-section of a copper wire is equal to area of a square of 2mm length

asked Feb 22, 2019 in JEE by kratos

+3 votes

1 answer

Academician E.Kh.Lenz, in his work "On the determination of the direction of induced currents",

asked Feb 22, 2019 in JEE by kratos

+1 vote

1 answer

An electric kettle has two coils. When one of them is switched on, the water in the kettle boils in 15 min.

asked Feb 6, 2019 in JEE by kratos

+2 votes

1 answer

A calorimeter contains a quantity of water. A second calorimeter contains a liquid whose specific heat is to be determined.

asked Nov 30, 2018 in JEE by kratos

+3 votes

1 answer

An electric kettle has two coils. When one of them is switched on, the water in the kettle boils in 6 minutes.

asked Nov 28, 2018 in Class 12 by kratos

+3 votes

1 answer

An electric kettle has two coils when one of these is switched on.

asked Oct 29, 2018 in Class 12 by kratos

+3 votes

1 answer

A steel wire has a resistance twice that of a copper wire. In which wire will more heat be dissipated: (a) in a parallel and

asked Sep 25, 2018 in JEE by kratos

+3 votes

1 answer

An electric motor has an ohmic resistance of 2Ω and is started from a 110 V line.

asked Aug 12, 2018 in JEE by kratos

+1 vote

1 answer

A circuit employing a copper wire of 2mm^2 cross-section is protected by a lead fuse wire of 0.2mm^2 cross-section.

asked Jul 8, 2018 in JEE by kratos

+1 vote

1 answer

A large current flows through an iron wire so that the temperature of the wire rises noticeably.

asked Jul 5, 2018 in JEE by kratos

+3 votes

1 answer

A heating coil has a resistance of 5 and is energized from a source of current with an internal resistance of 20Ω.

asked Mar 31, 2018 in JEE by kratos

+3 votes

1 answer

At the end of his article "Evolution of heat in conductors", Academician Lenz presented the following problem:

asked Mar 5, 2018 in JEE by kratos

+2 votes

1 answer

Regarding the operation of array transducers: a. To obtain a focused beam, the innermost element of the annular array is energized first

asked Feb 23, 2018 in Physics by kratos

+1 vote

1 answer

The line voltage in a charging station is 13V. The internal resistance of an accumulator being charged is 0.4Ω and its residual e.m.f. is 11V.

asked Feb 22, 2018 in JEE by kratos

+1 vote

1 answer

Given that (a) – 0.11V (b) 0.11V (c) – 0.04 V (d) 0.04 V

asked Jan 31, 2018 in Chemistry by kratos

+3 votes

1 answer

An electric kettle has two heating coils. When one of the coils is connected to an a.c. source,

asked Jan 3, 2018 in Class 12 by kratos

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