CBSE 12th Physics (Term 1) Paper 2021-22 | Magnetic Effect of Current Question 8 | Physics

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CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

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A current carrying wire kept in a uniform magnetic field, will experience a maximum force when it is

perpendicular to the magnetic field

parallel to the magnetic field

at an angle of 45$$^\circ$$ to the magnetic field

at an angle of 60$$^\circ$$ to the magnetic field

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

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A straight conducting rod of length l and mass m is suspended in a horizontal plane by a pair of flexible strings in a magnetic field of magnitude B. To remove the tension in the supporting strings, the magnitude of the current in the wire is

$${{mgB} \over l}$$

$${{mgl} \over B}$$

$${{mg} \over {lB}}$$

$${{lB} \over {mg}}$$

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

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A constant current is flowing through a solenoid. An iron rod is inserted in the solenoid along its axis. Which of the following quantities will not increase?

The magnetic field at the centre

The magnetic flux linked with the solenoid

The rate of heating

The self-inductance of the solenoid

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

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A proton and an alpha particle move in circular orbits in a uniform magnetic field. Their speeds are in the ratio of 9 : 4. The ratio of radii of their circular orbits $$\left( {{{{r_p}} \over {{r_{alpha}}}}} \right)$$ is

$${3 \over 4}$$

$${4 \over 3}$$

$${8 \over 9}$$

$${9 \over 8}$$

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Class 12 Subjects

Physics

Electromagnetism

Electrostatics Current Electricity Capacitor Magnetic Effect of Current Magnetic Properties of Matter Electromagnetic Induction Alternating Current Electromagnetic Waves

Optics

Geometrical Optics Wave Optics

Modern Physics