NEET UG Electromagnetic Induction — practice questions
61 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Electromagnetic Induction in the app →A bar magnet pushed into a coil at rest causes the galvanometer needle to kick because:A copper rod of length $0.5$ m slides at $4$ m/s perpendicular to a $0.2$ T field. The motional EMF is:A coil of self inductance $0.2$ H carries $5$ A. The magnetic energy stored is:A bar magnet falling into a vertical copper tube on the lab bench drops more slowly than in free fall because:Faraday's law of induction states:Lenz's law states that the induced current direction is such that it:Motional EMF induced across a rod of length L moving with velocity v perpendicular to a field B is:Self-inductance L of a coil is the proportionality between:The self-inductance of a long solenoid of length ℓ, area A, with n turns per unit length is approximately:Energy stored in an inductor of self-inductance L carrying current I is:Mutual inductance M between two coils relates the EMF induced in coil 2 to the current in coil 1 as:A transformer works on the principle of:Eddy currents are reduced in transformer cores by:A magnetic flux through a coil changes from 4 Wb to 1 Wb in 0.3 s. The average EMF induced is:A coil of inductance 0.5 H carries a current changing at 4 A s⁻¹. The induced EMF is:A bar magnet is dropped through a vertical conducting ring. The magnet:Maxwell's correction to Ampère's law introduced:An LC circuit oscillates with angular frequency ω equal to:When a rod moves perpendicular to a magnetic field at constant velocity, the FREE charges in the rod experiencThe SI unit of magnetic flux is the:The SI unit of inductance is the:Induced emf depends on the time rate of change of:The emf Blv produced by a moving conductor is called:Whose experiments led to modern generators and transformers?Lenz's law fixes which feature of the induced emf?Moving a magnet towards a coil induces in the coil an:The induced current opposes the change that produced it, because:Because the induced current opposes the motion, the mover must:The constant linking flux linkage to current is called:Inductance depends only on the coil's geometry and its:The constant M linking two neighbouring coils is called:The constant L for a single coil is called its:Mutual inductance is also called the coefficient of:An alternative name for the SI unit of magnetic flux is:Joseph Henry is credited in the text with discovering:If the induced current did not oppose the change, one could get:A galvanometer connected to a coil shows deflection only when:Flux through a coil can be changed without moving it, by changing:The negative sign in Faraday's law expresses which law?Faraday's law needs the notion of a quantity called magnetic:Magnetic flux is defined in the same way as flux that is:The induced emf equals the rate of change of flux with respect to:A steady, unchanging magnetic flux through a circuit induces an emf of:The negative sign in Faraday's law indicates the induced current's:For a closely wound coil, the flux change through each turn is:Doubling the number of turns of a coil changes the induced emf by:An emf produced by moving a conductor in a field is called:Motional emf shows an emf can be made without varying the:Motional emf can also be explained by invoking the force named after:An induced emf in a loop can be produced only by changing the:A galvanometer shows no deflection when the magnet is held:A current may be induced in a coil by flux change from another coil that is:The flux through a coil is proportional to its:Induction between two neighbouring coils is called inductance that is:Mutual inductance is also called the coefficient of mutual:Mutual inductance is worked out for two solenoids that are:An emf induced in a single isolated coil by its own flux change is:The constant in self-induction is the coefficient of self:Flux linkage through a coil of N turns is proportional to the:The proportionality of flux to current holds if the coil geometry is:Both mutual and self induction arise from a change in: