JEE Physics - MCQ Practice Questions
Physics is where JEE ranks are usually won or lost, since a single conceptual slip changes the whole answer. Questions here span mechanics, rotational motion, thermodynamics, waves and oscillations, electrostatics, current electricity, magnetism, optics, and modern physics. Numerical problems carry full derivations so you can see which step you skipped, not just which option was right.
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The magnetic field intensity at a distance r from a long straight current-carrying wire is:
A proton moving with velocity v perpendicular to a magnetic field B follows a circular path. The radius of this path is:
Two parallel wires carrying currents I₁ and I₂ in the same direction, separated by distance d. The force per unit length between them is:
A charged particle with charge q and mass m moves in a magnetic field. The cyclotron frequency is:
A rectangular coil of area A and N turns is rotated in a uniform magnetic field B with angular velocity ω. The maximum induced EMF is:
A solenoid of length L and cross-sectional area A has N turns. Its self-inductance is:
A conducting rod of mass m slides on two parallel rails separated by distance d in a magnetic field B perpendicular to the plane. If the rod moves with constant velocity v, the magnetic force on it is:
The magnetic moment of a current loop carrying current I with area A is:
A bar magnet is cut into two equal halves perpendicular to its length. The magnetic moment of each half is:
The mutual inductance between two coils depends on:
An electron (charge -e) and a proton (charge +e) move perpendicular to the same uniform magnetic field with the same velocity. The ratio of their radii of curvature is:
A magnetic field B is applied perpendicular to a conductor carrying current I. The Hall coefficient is related to:
A transformer has primary coil with N₁ turns and secondary coil with N₂ turns. The voltage ratio is:
When a conductor moves through a magnetic field, an EMF is induced. This is due to the Lorentz force on:
A paramagnetic material placed in a magnetic field becomes magnetized. This is because:
An inductor with inductance L and a resistor with resistance R are connected in series with a DC source. The time constant is:
A charged particle enters a uniform magnetic field region at an angle θ to the field direction. Its trajectory is:
The energy stored in a magnetic field of an inductor carrying current I is:
A superconductor exhibits the Meissner effect, which means:
A rectangular loop of wire with dimensions 5 cm × 10 cm is placed in a uniform magnetic field of 2 T perpendicular to its plane. If the loop is rotated by 90° in 0.1 s, what is the average induced EMF?