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#1 Class 12 Physics Moving Charges and Magnetism 2018 Short 1M CBSE
Write the expression for Biot-Savart's law.
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#2 Class 12 Physics Moving Charges and Magnetism 2020 Short 2M CBSE
Write an expression for the maximum kinetic energy acquired by charged particles accelerated by a cyclotron.
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#3 Class 12 Physics Moving Charges and Magnetism 2019 Short 2M CBSE
A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path wit...
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#4 Class 12 Physics Moving Charges and Magnetism 2021 Short 2M CBSE
Two particles A and B of masses $m$ and $2m$ have charges $q$ and $2q$ respectively. They move with velocities $v_1$ and $v_2$ in the same direction in the same magnetic field $B$ acting normally. If the forces $F_A$ ...
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#5 Class 12 Physics Moving Charges and Magnetism 2022 Short 5M CBSE
A long straight wire of circular cross-section of radius $a$ carries steady current $I$ uniformly distributed across its cross-section. Using Ampere's law, calculate the magnetic field for: (a) $r <a> a$ (outside).
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#6 Class 12 Physics Moving Charges and Magnetism 2020 Mcq 1M CBSE
An electron is moving along positive x-axis in a magnetic field which is parallel to the positive y-axis. In what direction will the magnetic force act on the electron?
A. Along $-x$ axis
B. Along $-z$ axis
C. Along $+z$ axis
D. Along $-y$ axis
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#7 Class 12 Physics Moving Charges and Magnetism 2022 Short 3M CBSE
A proton is moving with speed $2 \times 10^5$ m/s and enters a uniform magnetic field $B = 1.5$ T. The velocity makes an angle of 30° with $\vec{B}$. Calculate: (a) the pitch of the helical path, (b) kinetic energy af...
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#8 Class 12 Physics Moving Charges and Magnetism 2023 Long 5M CBSE
Two identical charged particles P and Q, each of mass $4 \times 10^{-26}$ kg and charge $4.8 \times 10^{-19}$ C, move with speed $2.4 \times 10^5$ m/s. They are equidistant (0.5 m) from the Y-axis. A magnetic field $B...
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#9 Class 12 Physics Moving Charges and Magnetism 2021 Mcq 1M CBSE
A long straight wire of circular cross-section of radius $a$ carries a steady current $I$ uniformly distributed across its cross-section. The ratio of magnitudes of magnetic field at a point $a/2$ above the surface to...
A. 04:01
B. 01:01
C. 04:03
D. 03:04
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#10 Class 12 Physics Moving Charges and Magnetism 2022 Long 5M CBSE
(A) State the working principle of a moving coil galvanometer. What modification is required to make its scale linear? (B) A galvanometer of resistance 49.5 $\Omega$ has a range of 0.05 A. Find the resistance needed t...
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#11 Class 12 Physics Moving Charges and Magnetism 2023 Long 5M CBSE
A point-sized object having charge 1 C and mass 1 g is projected with velocity $2\hat{i}$ m/s from point $(0, 2\text{ cm}, 0)$ in a magnetic field $\vec{B} = -0.1\hat{k}$ T in the first quadrant. (A) What will be the ...
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#12 Class 12 Physics Moving Charges and Magnetism 2020 Short 2M CBSE
Write an expression for the magnetic force per unit length between two parallel thin current-carrying wires. Hence define one ampere.
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#13 Class 12 Physics Moving Charges and Magnetism 2022 Mcq 1M CBSE
A charged particle is projected along the axis of a current-carrying loop. Which of the following statements is true?
A. The acceleration depends on the velocity of projection
B. The acceleration depends on the magnitude of current in the coil
C. The acceleration depends on the radius of the coil
D. The charged particle will move with constant velocity
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#14 Class 12 Physics Moving Charges and Magnetism 2019 Short 2M CBSE
A long solenoid has 800 turns per metre length. A current of 1.6 A flows through it. Calculate the magnetic field induction at the end of the solenoid on its axis. ($\mu_0 = 4\pi \times 10^{-7}$ T·m/A)
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#15 Class 12 Physics Moving Charges and Magnetism 2018 Mcq 1M CBSE
A current-carrying loop is placed in a uniform magnetic field. The torque acting on it does NOT depend upon
A. area of loop
B. shape of loop
C. number of turns in loop
D. strength of current and magnetic field
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#16 Class 12 Physics Moving Charges and Magnetism 2021 Short 2M CBSE
A charged particle of mass $m$ and charge $q$ travels on a circular path of radius $r$ perpendicular to a magnetic field $B$. Write the expression for the time taken by the particle to complete one revolution.
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#17 Class 12 Physics Moving Charges and Magnetism 2020 Short 2M CBSE
Derive the expression for radius $r$ of the circular path of an electron moving in a perpendicular uniform magnetic field $B$.
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#18 Class 12 Physics Moving Charges and Magnetism 2014 Mcq 1M CBSE
A current-carrying coil is placed in a uniform magnetic field of induction $B$. The current in the coil is $i$, it has $n$ turns, $A$ is the face area and the normal to the surface makes an angle $\theta$ with $B$. Th...
A. $niAB\theta$
B. $niAB\cos\theta$
C. $niAB\sin\theta$
D. $niAB\tan\theta$
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#19 Class 12 Physics Moving Charges and Magnetism 2019 Short 2M CBSE
A proton moving with a velocity $2.5 \times 10^7$ m/s enters a magnetic field of intensity 2.5 T at an angle of 30° with the magnetic field. Find the force on the proton. (Charge of proton $e = 1.6 \times 10^{-19}$ C)
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#20 Class 12 Physics Moving Charges and Magnetism 2022 Mcq 1M CBSE
A current passing through a circular coil of 2 turns produces a magnetic field of 8 T at its centre. The coil is rewound to have 4 turns and the current is doubled. The magnetic field at the centre of the new coil wil...
A. 64 T
B. 32 T
C. 16 T
D. 8 T
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