The working principle of dynamo is based on :
- Aheating effect of current
- ✓electromagnetic induction
- Cinduced magnetism
- Dinduced current
Answer: B.
View full solution →Question types
Electromagnetic Induction question types
25 questions across 5 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.
25
Questions
5
Question groups
5
Question types
01
M.C.Q [1M]
13 Q→02Short Answer Type Questions [2M]
2 Q→033 Marks Question
4 Q→044 Marks Questions
4 Q→05Long Answer Type Questions [5M]
2 Q→Sample Questions
Electromagnetic Induction questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
S.I. unit of self-induction is :
- Acoulomb (C)
- Bvolt (V)
- Cohm ($\Omega$)
- ✓henry (H)
Answer: D.
View full solution →On oscillating any metallic sphere in the magnetic field, its oscillatory motion is :
- AAccelerated
- ✓Damping
- CUniform
- DNone of these
Answer: B.
View full solution →What is produced by induction coil ?
- AHigh current
- ✓High voltage
- CLow current
- DLow voltage
Answer: B.
View full solution →Dimensions of $L/R$ will be (where L is inductance and R resistance) :
- A$M^{0}L^{0}T^{-1}$
- B$M^{0}LT$
- ✓$M^{0}L^{0}T$
- D$MLT^{-2}$
Answer: C.
View full solution →Derive dimension and SI unit of magnetic flux.
Why are coils of resistance boxes made of double wire ?
State the Lenz's law regarding electromagnetic induction. This law is based on the conservation law of which quantity?
A horizontal conducting wire of length 2 m oriented in east-west direction is falling down with a speed of 5 m/s perpendicular to the horizontal component of earth's magnetic field of $0.3 \times 10^{-4} T.$ Calculate the instantaneous value of induced emf across the ends of the wire.
View full solution →A horizontal conducting wire of length 2 m oriented in east-west direction is falling down with a speed of 5 m/s perpendicular to the horizontal component of earth's magnetic field of $0.3 \times 10^{-4} T.$ Calculate the instantaneous value of induced emf across the ends of the wire.
Define coefficient of mutual induction i.e. mutual inductance.
When the current in a primary coil is changed from zero to 2.0 A within 300 ms, then an induced emf of a 0.80 volt is produced in secondary coil. Calculate coefficient of mutual inductance between the two coils.
When the current in a primary coil is changed from zero to 2.0 A within 300 ms, then an induced emf of a 0.80 volt is produced in secondary coil. Calculate coefficient of mutual inductance between the two coils.
Write Faraday's laws of electromagnetic induction.
Obtain the expression for self inductance of an ideal solenoid.
(a) Define mutual inductance and write its S.I. unit.
(b) A square loop of side 'a' carrying a current $I_{2}$ is kept at distance x from an infinitely long straight wire carrying a current $I_{1}$ as shown in the figure. Obtain the expression for the resultant force acting on the loop.
View full solution →(b) A square loop of side 'a' carrying a current $I_{2}$ is kept at distance x from an infinitely long straight wire carrying a current $I_{1}$ as shown in the figure. Obtain the expression for the resultant force acting on the loop.
Define self-inductance and write its S.I. unit. Find the self inductance for a solenoid of N turns, length $l$ and radius $r$.
View full solution →How is Lenz's law based on conservation of energy ?
Define eddy currents. How are they produced? In what sense are these currents undesirable in a transformer and how are these reduced in a device ?
Differentiate between self induction and mutual induction with examples.
(a) Derive the expression for the magnetic energy stored in a evil.
(b) Derive the expression for the mutual inductance between two plane coils.
(b) Derive the expression for the mutual inductance between two plane coils.
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