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Physics-

General

Easy

Question

A transformer is employed to

Obtain a suitable dc voltage
Convert dc into ac
Obtain a suitable ac voltage
Convert ac into ac

The correct answer is: Obtain a suitable ac voltage

A transformer is a device used to convert alternating current at high voltage into low voltage and $v i c e minus v e r s a$

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A solenoid is $1.5 blank m$ long and its inner diameter is $4.0 blank c m$ . It has three layers of windings of 1000 turns each and carries a current of $2.0 blank a m p e r e s$ . The magnetic flux for a cross-section of the solenoid is nearly

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What is increased in step-down transformer

What is increased in step-down transformer

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Fleming’s left and right hand rule are used in

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The two tangents to the curve $a x to the power of 2 end exponent plus 2 h x y plus b y to the power of 2 end exponent equals 1 comma blank a greater than 0$ at the points where it crosses $x$ -axis, are

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A circular metal plate is heated so that its radius increases at a rate of 0.1 mm per minute. Then the rate at which the plate’s area is increasing when the radius is 50 cm is

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