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MCQ Magnetic Charges And Magnetism Chapter 4 Class 12 Physics

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MCQ’s For All Chapters – Physics Class 12th

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. An electron with a speed of 1.8 x 106 m/s is moving in a circular orbit in a uniform magnetic field of 10-4 Wb/m², the radius of the circular path of the electron is

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Question 1 of 10

2. A particle of charge 1.6 x 10-19 C and mass 1.8 x 10-27 kg is moving around the path of radius 2 x 104 m with velocity 2.4 x 106 m/s. The magnetic field necessary is (in Wb/m²)

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Question 2 of 10

3. The force acting on a charge q moving with velocity 4096_image001 in a magnetic field 4096_image002 is given by

Magnetic Lorentz Force Multiple Choice Questions for CBSE Class 12 Physics   Topperlearning

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Question 3 of 10

4. A Charge is fired through a magnetic field. The magnetic force acting on it is maximum when the angle between the direction of motion and magnetic field is

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Question 4 of 10

5. The frequency (4102_image020) of charged particle, moving at right angles to the magnetic field is independent of

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Question 5 of 10

6. Two straight horizontal parallel wires are carrying the same current in same direction, d is the distnace between the wires. You are povided with a small freely suspended magnetic needle. At which of the following positions will the orientation of the needle be independent of the magnitude of current in the wires?

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Question 6 of 10

7. A proton enters a magnetic field with a velocity of 4108_image033m/s making an angle of 30° with the field. What is the force experienced by the proton if B = 3.0 T.

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Question 7 of 10

8. When a charged particle moves in a magnetic field, its kinetic energy always

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Question 8 of 10

9. A proton with 1MeV kinetic energy is moving in a circular path of radius R in a uniform magnetic field. What should be the energy of an α - particle to describe a circle of same radius in the same magnetic field?

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Question 9 of 10

10. An electron is moving in a circular orbit in a magnetic field 4107_image026 Wb/m², the time period of electron is

Magnetic Lorentz Force Multiple Choice Questions for CBSE Class 12 Physics   Topperlearning

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Question 10 of 10

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