Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 291

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The resistance $(R)$ in a series $L C R -$ circuit is $24 Ω$ , while the reactance of the inductor $(L)$ and the capacitor $(C)$ are $2 Ω$ and $28 Ω$ respectively at a certain frequency. The total impedance $(Z)$ of the circuit, if the frequency is halved, is nearly:

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Important Questions on Electromagnetic Induction

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 292

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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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 293

A choke coil is needed to operate an arc lamp at

250 V (rms)

and

50 Hz

. The lamp has an effective resistance of

15 Ω

when running at

10 A (rms)

. The inductance of the choke coil is:

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 294

A pure inductor of

50.0 mH

is connected to source of

220 V

. Find the inductive reactance. (Assume frequency to be

50 Hz

)

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 295

In an

A C

circuit the potential differences across an inductance and resistance joined in series are respectively

16 V

and

20 V

. The total potential difference across the circuit is-

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 297

In a

L R

circuit the

A . C .

source has voltage

220 V

and the potential difference across the inductance is

176 V

. The potential difference across the resistance will be:

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 298

An alternating

emf

10 \cos (100 t)

volt

is connected in series with a resistance of

10

ohm

and inductance of

100 mH

. What is the phase difference?

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 299

An inductor

20 \times 10^{- 3} H

, a capacitor

100 μF

, and a resistor

50 Ω

are connected in series across a source of

emf

V = 10 \sin (314 t)

. If resistance is removed from the circuit and the value of inductance is doubled, then the variation of current with time in the new circuit is

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Physics Crash Course MHT-CET>Chapter 18 - Electromagnetic Induction>Exercise 1>Q 300

An

A . C .

source is in series with

R

and

L

. If respective potential drops are

200 V

and

150 V

, what is the applied voltage ?