Recent questions tagged current laws

+2 votes

1 answer

Why rheostat is used in the circuit ?

asked Apr 5, 2019 in JEE by kratos

+2 votes

1 answer

A sensitive milliammeter is used as a voltmeter. Find the value in volts of one scale division of this instrument

asked Apr 3, 2019 in JEE by kratos

+3 votes

1 answer

The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K, is best described by

asked Apr 2, 2019 in JEE by kratos

+1 vote

1 answer

An ammeter and a milliammeter are converted from the galvanometer. Out of the two, Which current measuring instrument

asked Mar 31, 2019 in Class 12 by kratos

+1 vote

1 answer

A person decides to use his bath tub water to generate electric power to run a 40 watt bulb. The bath tube is located at a height of 10 m

asked Mar 21, 2019 in JEE by kratos

+1 vote

1 answer

Two cells A and B are connected in the secondary circuit of a potentiometer one at a time

asked Mar 17, 2019 in JEE by kratos

+2 votes

1 answer

3 A current is flowing through two identical conductors having diameter equal to 0.2 cm.

asked Mar 16, 2019 in JEE by kratos

+3 votes

1 answer

A coil has resistance of 18Ω when its mean temperature is 200°C and of 20Ω when its mean temperature is 500°C.

asked Mar 16, 2019 in JEE by kratos

+1 vote

1 answer

Explain the term Current Electricity.

asked Mar 15, 2019 in JEE by kratos

+3 votes

1 answer

By error, a student place moving-coil voltmeter V (nearly ideal) in series with the resistance in a circuit

asked Mar 13, 2019 in JEE by kratos

+3 votes

1 answer

Find the current (in mA) in the wire between points A and B.

asked Mar 12, 2019 in JEE by kratos

+2 votes

1 answer

The resistance of the shunt '*' and resistance 'G' of the galvanometer should have the following relation.

asked Mar 10, 2019 in JEE by kratos

+2 votes

1 answer

Give the name of components which is designed to oppose the ow of current.

asked Mar 2, 2019 in JEE by kratos

+2 votes

1 answer

A thermistor is a semi conductor whose electric resistance (1) is independent of temperature

asked Mar 2, 2019 in JEE by kratos

+1 vote

1 answer

A battery whose e.m.f. is 6 V and whose internal resistance is 1.4Ω is applied to an external circuit

asked Mar 1, 2019 in JEE by kratos

+3 votes

0 answers

The potential difference between two terminals of an electric iron is 220 V and the current flowing through its element is 5A.

asked Feb 26, 2019 in JEE by kratos

+1 vote

1 answer

A voltmeter with an internal resistance of 400Ω is connected across a branch of a circuit with a resistance of 20Ω and reads 100 V.

asked Feb 26, 2019 in JEE by kratos

+1 vote

1 answer

It is necessary to use a milliammeter with a 20 mA scale as an ammeter for measuring currents up to 5 A.

asked Feb 24, 2019 in JEE by kratos

+2 votes

1 answer

An electric light rated at 110V and 60 W is connected to a 120 V dry cell.

asked Feb 23, 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

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