ElectroMagnetic InductionHard
Question
A coil of resistance 400 Ω is placed in a magnetic field. If the magnetic flux φ (wb) linked with the coil varies with time t (sec) as φ = 50 t2 + 4, the current in the coil at t = 2 sec is
Options
A.1 A
B.0.5 A
C.0.1 A
D.2 A
Solution
|emf| = 
= 100t
at t =, emf = 200 V
⇒ i =
= 0.5 A
= 100tat t =, emf = 200 V
⇒ i =
= 0.5 ACreate a free account to view solution
View Solution FreeMore ElectroMagnetic Induction Questions
The dipole moment of each molecule of a paramagnetic gas is 1.5 × 10-23 A-m2. the temperature of gas is 27oC and th...A square frame of wire of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of i...An aluminium ring B faces an electromagnet A. The current I through A can be altered. Then which of the following statem...A metal rod of resistance 20 Ω is fixed along a diameter of conducting ring of radius 0.1 m and lies in x-y plane. ...In the given circuit the current rises after the key is closed. At instant, when the current is 15 mA. Then potential di...