Electromagnetic Induction questions
610 published questions with worked solutions.
- A metal rod of length L rotates about one end at origin with a uniform angular velocity ω. The magnetic field radially falls off...
- A circular loop of radius 20 cm and resistance 2Ω is placed in a time varying magnetic field B=(2t^2+2t+3) T. At t=0, for the...
- A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as B=0.4 sin(300t) Tesla. The normal to the...
- A 30 cm long solenoid has 10 turns per cm and area of 5 cm². The current through the solenoid coil varies from 2 A to 4 A in 3.14...
- The magnetic energy stored in an inductor of inductance 4 carrying a current of 2 A is :
- Two conducting circular loops of radii R_1 and R_2 are placed in the same plane with their centres coinciding. If R_1 R_2, the...
- A rectangular loop of length 2.5 m and width 2 m is placed at 60° to a magnetic field of 4T. The loop is removed from the field...
- Two coils have mutual inductance 0.002 H. The current changes in the first coil according to the relation i = i₀sinωt, where i₀ =...
- A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth's...
- A capacitor of capacitance 100 μF is charged to a potential of 12 V and connected to a 6.4 mH inductor to produce oscillations....
- A square loop of side 10 cm and resistance 0.7 Ω is placed vertically in east-west plane. A uniform magnetic field of 0.20 T is...
- A ceiling fan having 3 blades of length 80 cm each is rotating with an angular velocity of 1200 rpm. The magnetic field of earth...
- The magnetic flux φ (in weber) linked with a closed circuit of resistance 8 Ω varies with time (in seconds) as φ = 5t² – 36t + 1....
- A coil is places perpendicular to a magnetic field of 5000 T. When the field is changed to 3000 T in 2 s, an induced emf of 22 V...
- A small square loop of wire of side ℓ is placed inside a large square loop of wire of side L (L = ℓ²). The loops are coplanar and...
- The time taken for the magnetic energy to reach 25% of its maximum value, when a solenoid of resistance R, inductance L is...
- A bar magnet is passing through a conducting loop of radius R with velocity v. The radius of the bar magnet is such that it just...
- A transmitting station releases waves of wavelength 960 m. A capacitor of 2.56 is used in the resonant circuit. The self...
- A coil of inductance 2H having negligible resistance is connected to a source of supply whose voltage is given by V = 3t volt....
- An inductor of 10 mH is connected to a 20 V battery through a resistor of 10 k and a switch. After a long time, when maximum...
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