Electromagnetic Induction questions
610 published questions with worked solutions.
- A coil has 2000 turns and area of 70 cm^2 . The magnetic field perpendicular to the plane of the coil is 0.3 Wb/m^2 and takes 0.1...
- Two coils A and B have mutual inductance 2 10^ -2 henry. If the current in the primary is i = 5 (10 t) then the maximum value of...
- The frequency of the output signal becomes _______ times by doubling the value of the capacitance in the LC oscillator circuit...
- An oscillator circuit consists of an inductance of 0.5 mH and a capacitor of 20 . The resonant frequency of the circuit is nearly...
- The magnetic flux across a loop of resistance 10 is given by =5t^2-4t+1 weber. How much current is induced in the loop after 0.2...
- A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series...
- A square loop of wire of side length 10 cm is placed at angle of 45° with a magnetic field that changes uniformly from 0.1 T to...
- In a coil, rate of change of area is 5 m^2 /milli second and current becomes 1 ampere from 2 ampere in 2 10^ -3 s. If magnitude...
- Statement 1: An emf E is induced in a closed loop where magnetic flux is varied. The induced E is not a conservative field...
- A transmitter transmits at a wavelength of 300 m. A condenser of capacitance 2.4 is being used. The value of the inductance for...
- A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e. m. f. is [NEET 2013]
- A small square loop of wire of side l is placed inside a large square loop of wire of side L (L>l). The loop are coplanar and...
- Statement 1: There can be induced e. m. f. in an inductor even if the current through it is zero Statement 2: Induced e. m. f....
- A ring of mass m, radius r with charge per unit length ' '. encloses a magnetic field such that B=-B_0 K, where r a; B=0 when r>a...
- In a car spark coil an e. m. f of 40000 volts is induced in a secondary when the primary current changes from 4 A to 0 in 10 ....
- The current in coil changes from 0.5 A to 2 A in 0.03 s inducing a voltage of 8 V across it. Find initial energy stored in the...
- A square frame with side 'a' and a straight conductor carrying a constant current I are located in the same plane. The resistance...
- Two vertical rails are connected at the ends with a capacitor. There is a magnetic field B directed horizontally. A wire of mass...
- A circular coil of diameter 21 cm is placed in a magnetic field of induction 10^ -4 T. The magnitude of flux linked with coil...
- A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction 1 Wb m^ -2 in such a way that its axis makes...
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