Physics GK · all questions

Electricity and Magnetism
practice.

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524

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Q341

When you walk on a woolen carpet and bring your finger near the metallic handle of a door, an electric shock is produced. This is because

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Q342

. . . . . . . . across the ends of a resistance is directly proportional to the current flowing throught it, provided its temperature remains the same.

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Q343

If the three resistors of 10 Ω, 8 Ω and 7 Ω are connected in series order, then the effective resistance in the circuit will be . . . . . . .

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Q344

The device which works on the principle of electromagnetic induction is

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Q345

Which of the following is not true about electromagnetic?

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Q346

Resistance (R) = Voltage (V) / . . . . . . . .

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Q347

The electric motor transforms . . . . . . . .

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Q348

A permanent magnet repels

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Q349

The value of electromotive force (ε) is equal to-

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Q350

The fuse in an electric circuit is connected in

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Q351

A wire has the resistance 9Ω. Its radius becomes double then the new value of resistance of the wire is :

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Q352

When two resistors are connected in parallel, have . . . . . . . .

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Q353

A conductor having some appreciable resistance is called a

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Q354

Wheatstone bridge is used for measurement of-

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Q355

. . . . . . . . are also known as heat waves.

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Q356

Which of the following devices converts chemical energy into electrical energy?

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Q357

A 100 W electric bulb is used for 10 h/day. How many units of energy are consumed in 30 days?

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Q358

R = \frac{R _{1} R _{2}}{R _{1} + R _{2}}

the formula represent?

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Q359

The dynamo converts

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Q360

If the resistance is reduced to half, the current . . . . . . . .

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