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A coil having $n$ turns and resistance $R Ω$ is connected with a galvanometer of resistance $4 R$ $Ω$ . This combination is moved in time $t$ seconds from a magnetic flux $ϕ_{1} Wb$ to $ϕ_{2} Wb$ . The induced current in the circuit is

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Important Questions on Electromagnetic Induction

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 17

In a coil of resistance

100 Ω

, a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 18

A wire of length

50 cm

moves with a velocity of

300 m \min^{- 1}

, perpendicular to a magnetic field. If the

e . m . f .

induced in the wire is

2 V

, the magnitude of the field in Tesla is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 19

If rotational velocity of a dynamo armature is doubled, then induced

e . m . f .

will become

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 20

A straight conductor

0.1 m

long moves in a uniform magnetic field

0.1 T

. The velocity of the conductor is

15 m s^{- 1}

and is directed perpendicular to the field. The e.m.f. induced between the two ends of the conductor is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 21

A rod of $10 cm$ length is moving perpendicular to uniform magnetic field of intensity $5 \times 10^{- 4} Wb m^{- 2}$ . If the acceleration of the rod is $5 m s^{- 2}$ then the rate of increase of induced emf is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 22

A boat is moving due east in a region where the earth's magnetic field is

5.0 \times 10^{- 5} N A^{- 1} m^{- 1}

due north and horizontal. The boat carries a vertical aerial

2 m

long. If the speed of the boat is

1.50 m s^{- 1}

, the magnitude of the induced e.m.f. in the wire of aerial is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 23

Consider a metal ball of radius

r

moving at a constant velocity

\vec{v}

in a uniform magnetic field of induction

\vec{B}

. Assuming that the direction of velocity forms an angle

α

with the direction of

\vec{B}

, the maximum potential difference between points on the ball is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 10 - Electromagnetic Induction>Competitive Thinking>Q 24

An aircraft with a wingspan of

40 m

files with a speed of

1080 km {hr}^{- 1}

in the eastward direction at a constant altitude in the northern-hemisphere, where the vertical component of the earth's magnetic field

1.75 \times 10^{- 5} T

. Then the emf developed between the tips of the wings is

A coil having n turns and resistance R Ω is connected with a galvanometer of resistance 4R Ω. This combination is moved in time t seconds from a magnetic flux ϕ1 Wb to ϕ2 Wb. The induced current in the circuit is

Important Questions on Electromagnetic Induction

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A coil having $n$ turns and resistance $R Ω$ is connected with a galvanometer of resistance $4 R$ $Ω$ . This combination is moved in time $t$ seconds from a magnetic flux $ϕ_{1} Wb$ to $ϕ_{2} Wb$ . The induced current in the circuit is