Electromagnetic Induction questions
610 published questions with worked solutions.
- What is the self-inductance of a solenoid of length 31.4 cm, area of cross-section 10^ -3 m^2 and total number of turns 10^3 ?
- What is the self-inductance of an air-core solenoid 1 m long, diameter 0.05 m, if it has 500 turns? (Take, ^2=10 )
- A coil is wound on a core of rectangular cross-section. If all the linear dimensions of core are increased by a factor 2 and...
- A coil of wire of certain radius has 100 turns and a self-inductance of 15 mH. The self-inductance of a second similar coil of...
- Two coils have a mutual inductance 5 mH. The current changes in the first coil according to equation i=i_0 t, where, i_0=10 A and...
- A current i=10 (100 t) A is passed in first coil, which induces a maximum emf 5 V in second coil. The mutual inductance between...
- According to phenomenon of mutual inductance,
- Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
- How much mutual inductance will be produced (in joule), if the change in magnetic flux in any coil Y due to current of 4 A in any...
- Two coils A and B have 200 and 400 turns, respectively. A current of 1 A in coil A causes a flux per turn of 10^ -3 Wb to link...
- The number of turns of primary and secondary coils of a transformer are 5 and 10 respectively and mutual inductance of the...
- If number of turns in primary and secondary coils is increased to two times each, the mutual inductance
- If two coils have self-inductance L_1 and L_2, then coefficient of mutual induction will be
- The emf induced in a secondary coil is 20000 V, when the current breaks in the primary coil. The mutual inductance is 5H and the...
- There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is...
- Where t is in second and is in weber. At time t = 1 s, the value of induced emf (in volt) is
- A varying magnetic flux linking a coil is given by _B=xt^2. If at time t = 3 s, the emf induced is 9 V, then the magnitude of x is
- A circular coil of radius 10 cm, 500 turns and resistance 2 is placed with its plane perpendicular to the horizontal component of...
- A coil of resistance 400 is placed in a magnetic field. If the magnetic flux _B (Wb) linked with the coil varies with time t...
- If a coil of 40 turns and area 4.0 cm^2 is suddenly removed from a magnetic field, it is observed that a charge of 2.0 10^ -4 C...
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