WebOct 3, 2024 · Q.3. An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of (a) the strength of the magnet (b) number of turns of coil (c) the resistivity of the wire of the coil (d) speed with which the magnet is moved. Answer Answer: (c) WebIf a current is induced in the coil, Faraday reasoned that there must be what he called an electromotive force pushing the charges through the coil. This interpretation turned out to …
Explain how an e.m.f. is induced in the secondary coil
WebJun 19, 2024 · The e.m.f. induced in a secondary coil is `20000 V` when the current breaks in the primary coil. The mutual inductance is `5H` and the current reaches to zero in `10^(-4) sec` in the primary. The maximu current in the primary before it breaks is A. `0.1 A` B. `0.4A` C. `0. 6A` D. `0.8 A` WebStep 1: Given data Coefficient of mutual induction, M = 5 H Change in current, di = 10 A Change in time, dt = 5 × 10 - 4 s Step 2: Formula used Induced emf in the secondary coil = ε s = - M d i d t Step 3: Calculation ε s = - M d i d t = - 5 10 5 × 10 - 4 = 1 × 10 5 V [The negative sign only indicates that the emf opposes the change.] flybar locking tool trex 450
The e.m.f. induced in a secondary coil is 20000 V when the current …
WebAug 6, 2024 · The inductance of a coil refers to the electrical property the inductive coil has to oppose any change in the current flowing through it. It therfore follows that inductance … WebThe exact reason for induced EMF is the change in flux linkage with respect to the coil which continues until the movement of both magnet bar or coil is stopped. In other words, a strong magnetic field or flux won’t induce EMF in the static conductor. Hence, change in flux is the must have phenomena to induce EMF either in coil or conductors. WebIn a transformer, the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere/second in the primary … flybar pogo ball trick board