1.
A proton and an alpha particle enter the same magnetic field with equal speed. Which particle will move in a larger circular path?
2.
The magnetic force on an electron moving perpendicular to a magnetic field does not change its
3.
The magnetic field at the centre of a circular coil is doubled by
4.
The magnetic field inside a long solenoid depends mainly on
5.
A charged particle enters a magnetic field at an angle of 45°. The trajectory is
6.
The Lorentz force acting on a charged particle is
7.
A current-carrying wire is placed between the poles of a magnet. The magnetic field is from North to South, and current is upward. The conductor moves
8.
The magnetic field due to an infinitely long straight conductor varies as
9.
The unit of magnetic field intensity is
10.
A cyclotron cannot accelerate
11.
A moving charge enters a uniform magnetic field. The work done by the magnetic field is
12.
A negatively charged particle enters a magnetic field directed out of the page while moving towards the right. The particle initially deflects
13.
Assertion (A): A magnetic field cannot change the kinetic energy of a charged particle. Reason (R): Magnetic force is always perpendicular to velocity.
14.
Assertion (A): A current-carrying conductor experiences force in a magnetic field. Reason (R): Moving charges experience magnetic force.
15.
The torque on a current loop becomes maximum when the angle between magnetic field and the normal to the loop is
16.
The SI unit of magnetic dipole moment is
17.
Match the Columns Column–I P. Oersted Q. Ampere R. Fleming S. Cyclotron: Column–II 1. Left-Hand Rule 2. Magnetic effect of current 3. Circular motion of charged particles 4. Force between current-carrying conductors Choose the correct matching:
18.
The radius of the circular path of a charged particle increases with
19.
The magnetic field produced by a current-carrying conductor depends upon
20.
The magnetic field lines
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