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An arrangement with a pair of quarter circular coils of radii r and R with a common centre C and carrying a current I is shown.

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The permeability of free space is μ0. The magnetic field at C is

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Important Questions on Magnetic Effects of Current and Magnetism

EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 12
Which of the following does not hold for magnetic field lines?
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 13
Which magnetic field is similar to that of a bar magnet?
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 14
In a coaxial straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero
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JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 15
A current I flows along the length of an infinitely long, straight, thin-walled pipe. Then,
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 16
A very high magnetic field is applied to a stationary charge. Then the charge experiences:
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 17
Select the correct statement for a charged particle moving through a magnetic field perpendicular to its direction.
EASY
JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 18
A charged particle moves along a circle under the action of possible constant electric and magnetic fields. Which of the following are possible?
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JEE Main
IMPORTANT
Physics Crash Course JEE Main>Chapter 15 - Magnetic Effects of Current and Magnetism>Level 1>Q 19
Two protons whose velocities are in the ratios 4:1 move perpendicular to a uniform magnetic field. The ratio of the radii of their paths will be,