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A uniform and constant magnetic field B is directed perpendicu
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A uniform and constant magnetic field is directed perpendicularly into the plane of the page everywhere within a rectangular region as shown in figure-- .A wire circuit in the shape of a semicircle is rotated at uniform angular speed in counter ciockwise direction in the plane of the page about an axis passing through point . The axis is perpendicular to the page at the edge of the field and directed through the centre of the straight line portion of the circuit. Which of the following graphs best approximates the EMF induced in the circuit as a function of time ? (A) (B) (C) (D) Emf induced

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Book:

Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

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A uniform and constant magnetic field is directed perpendicularly into the plane of the page everywhere within a rectangular region as shown in figure-- .A wire circuit in the shape of a semicircle is rotated at uniform angular speed in counter ciockwise direction in the plane of the page about an axis passing through point . The axis is perpendicular to the page at the edge of the field and directed through the centre of the straight line portion of the circuit. Which of the following graphs best approximates the EMF induced in the circuit as a function of time ? (A) (B) (C) (D) Image
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Practice questions from Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

Question 1
Medium
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A ring is placed coaxially with a solenoid as shown in figure- As the switch is closed at , the ring : (A) Is attracted towards (B) Is repelled by (C) Is initially repelled and then attracted (D) Is initially attracted and then repelled.
Topic

Topic:

Electromagnetic Induction

Book

Book:

Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

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Question 2
Medium
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(a) Calculate the mutual inductance between two coils when a current of in first coil changes to in and induces an EMF of in the other coil. (b) Also calculate the induced EMF in the second coil if current in the first changes from to in . [(a) (b)
Topic

Topic:

Electromagnetic Induction

Book

Book:

Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

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Question 3
Hard
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Views: 5,743

In the figure shown ' ' is a fixed conducting ring of negligible resistance and radius ' '. is a uniform rod of resistance . It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity (). There is a uniform magnetic field of strength ' ' pointing inwards. ' ' is a fixed resistance connected bctween center of ring and its circumference which does not hinder the path of rotuting rod : (A) Current through ' ' is zero (B) Current through ' ' is (C) Direction of current in external 'r' is from centre to circumference (D) Direction of current in external 'r' is from circumference to centre
Topic

Topic:

Electromagnetic Induction

Book

Book:

Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

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Question 4
Medium
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A long solenoid of length , cross-sectional area , having 1000 turns has wound about its centre a srnall coil of 20 turns. Compute the mutual inductance of the pair of solenoid and the coil. What is the induced EMF in the coil when the current in the solenoid changes at the rate of ?
Topic

Topic:

Electromagnetic Induction

Book

Book:

Physics Galaxy Magnetism, EMI Alternating Current Vol 3 B (Ashish Arora)

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Practice more questions from Electromagnetic Induction

Question 1
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An inductor , a resistor and a battery are connected in series. The time elapsed before the current reaches of the maximum value is
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Book

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Master Resource Book in JEE Main Physics (Arihant)

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Question 2
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 is an infinitely long wire placed in the plane of rectangular coil of dimensions as shown in the figure. Calculate the mutual inductance of wire and coil
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Electromagnetic Induction

Book

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Concepts of Physics (HC Verma Part II)

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Question 4
Medium
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The current in the given circuit is increasing at a rate . The charge on the capacitor at an instant when the current in the circuit is will be:
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Electromagnetic Induction

Book

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Question Text
A uniform and constant magnetic field is directed perpendicularly into the plane of the page everywhere within a rectangular region as shown in figure-- .A wire circuit in the shape of a semicircle is rotated at uniform angular speed in counter ciockwise direction in the plane of the page about an axis passing through point . The axis is perpendicular to the page at the edge of the field and directed through the centre of the straight line portion of the circuit. Which of the following graphs best approximates the EMF induced in the circuit as a function of time ? (A) (B) (C) (D)
TopicElectromagnetic Induction
SubjectPhysics
ClassClass 12
Answer TypeText solution:1
Upvotes146