NEET UG Magnetism & EMI — practice questions
36 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Magnetism & EMI in the app →The Lorentz force on a charge q moving with velocity v in fields E and B is:The force on a charge q moving with speed v perpendicular to a magnetic field B has magnitude:The magnetic force on a stationary charge in a magnetic field is:A charged particle moving in a uniform magnetic field perpendicular to B describes a:The radius of circular motion of a particle of charge q, mass m, speed v in field B (perpendicular) is:The cyclotron frequency (angular) of a charged particle in field B is:In a velocity selector (crossed E and B), a particle passes undeflected if v equals:The Biot–Savart law gives the magnetic field due to an element of current as proportional to:The magnitude of the magnetic field at the centre of a circular current loop of radius R carrying current I isThe magnetic field at a distance r from a long straight current-carrying wire is:Magnetic field inside a long ideal solenoid with n turns per unit length carrying current I is:For a toroid with N total turns, mean radius r, carrying current I, the magnetic field inside is:Ampere's circuital law in integral form states ∮ B · dl equals:The magnetic force per unit length between two parallel wires carrying currents I₁ and I₂ separated by distancTwo parallel wires carrying currents in the same direction:Two parallel wires carrying currents in opposite directions:The magnetic moment of a current loop with area A and current I is:Torque on a magnetic dipole moment m in uniform field B is:Potential energy of a magnetic dipole m in field B is:The SI unit of magnetic field B is:A galvanometer measures small currents using the principle that the torque on a coil in a magnetic field is prA moving coil galvanometer uses a radial magnetic field so that:Magnetic field at the centre of a current-carrying square loop is greater than at the centre of a circular looThe magnetic field along the axis of a long current-carrying wire is:Magnetic monopoles, as isolated magnetic charges, have so far been:The unit of magnetic flux is the:Magnetic field inside an ideal solenoid is:Force on a current-carrying wire of length L placed in field B at angle θ to it is:The unit ratio μ0 ε0 has the same dimensions as:A uniform but time-varying magnetic field $B(t)$ exists in a circular region of radius $a$ and is directed intA wire of length $1\,\mathrm{m}$ is moving at a speed of $2\,\mathrm{ms}^{-1}$ perpendicular to its length andA small square loop of wire of side $l$ is placed inside a large square loop of wire of side $L$ ($L > l$). ThFor a positively charged particle moving in a $x - y$ plane initially along the $x$-axis, there is a sudden chAn infinitely long conductor $PQR$ is bent to form a right angle as shown. A current $I$ flows through $PQR$. A cell is connected between the points $A$ and $C$ of a circular conductor $ABCD$ of centre $O$ with angle $OCTwo straight long conductors $AOB$ and $COD$ are perpendicular to each other and carry currents $i_1$ and $i_2