A resistance of 400 Ω is connected in series with an inductor of 3 π H and this combination is connected across an A . C . source as shown in figure.

In the circuit, potential difference across resistance is in same phase with the current.

In the circuit, peak value of current is 5 4 A .

In the circuit, potential difference across inductor is 53 ° leading with current.

In the circuit, potential difference across inductor is 37 ° leading with current.

A resistance of 400 Ω is connected in series with an inductor of 3 π H and this combination is connected across an A . C . source as shown in figure.

In the circuit, potential difference across resistance is in same phase with the current.

The figure shows an LCR network connected to a 300 V A C supply. The circuit elements are such that R = X L = X C = 10 Ω . Three voltmeters V 1 , V 2 and V 3 are connected as shown. Which of the following represents the correct set of readings of the voltmeters?

V 1 = 300 V , V 2 = 300 V , V 3 = 300 V

V 1 = 100 V , V 2 = 100 V , V 3 = 100 V

V 1 = 250 V , V 2 = 0 V , V 3 = 150 V

V 1 = 300 V , V 2 = 100 V , V 3 = 100 V

An electric generator is based on_____

Faraday's laws of electromagnetic induction

Motion of charged particles in an electromagnetic field

Fission of Uranium by slow neutrons

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A resistance of $400 Ω$ is connected in series with an inductor of $(\frac{3}{π})$ $H$ and this combination is connected across an $A . C .$ source as shown in figure.

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Important Questions on Electromagnetic Induction and Alternating Currents

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 47

A power transmission line feeds input power at

2300 V

to a step down transformer with its primary windings having

4000

turns. The output power is delivered at

230 V

by the transformer. If the current in the primary of the transformer is

5 A

and its efficiency is

90 %

, the output current would be:

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 48

A power transmission line feeds input power at

2300 V

to a step-down transformer with its primary windings having

4000

turns giving the output power at

230 V

. If the current in the primary coil of the transformer is

5 A

and its efficiency is

90 %

, the output current would be:

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 49

A transformer consisting of

300

turns in the primary and

150

turns in the secondary gives output power of

2.2 k W

. If the current in the secondary coil is

10 A

, then the input voltage and current in the primary coil are:

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 50

An ideal transformer converts

220 V

AC to

3.3 kV

AC. It transmits the power of

4.4 kW

. If the primary coil has

600

turns, then alternating current in the secondary coil is

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 51

An alternating current having peak value $14 A$ is used to heat a metal wire. To produce the same heating effect, a constant current $i$ can be used, where $i$ is

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 52

A transformer is used to light a

100 W,

110 V

lamp from a

220 V

supply. If the supply current is

0.6 A,

the efficiency of the transformer is

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Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 53

A step-down transformer has turn ratio

20 : 1

. If

8 V

is applied across

0.4 Ω

secondary then the primary current will be

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IMPORTANT

Physics Crash Course NEET>Chapter 15 - Electromagnetic Induction and Alternating Currents>Level 1>Q 54

A step-up transformer operates on a

230 V

line and a load current of

2 A

. The ratio of primary and secondary windings is

1 : 25

. Then the current in the primary is

A resistance of 400 Ω is connected in series with an inductor of 3π H and this combination is connected across an A.C. source as shown in figure.

Important Questions on Electromagnetic Induction and Alternating Currents

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A resistance of $400 Ω$ is connected in series with an inductor of $(\frac{3}{π})$ $H$ and this combination is connected across an $A . C .$ source as shown in figure.