Electromagnetic Induction
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Faraday’s and Lenz’s Laws
SubtopicFaraday’s and Lenz’s Laws under Electromagnetic Induction for Grade 12 CBSE.
Preview questions (no answers)
- 1.
When the North pole of a strong bar magnet is rapidly moved towards a closed stationary coil, the face of the coil facing the magnet will behave as:
A.A South pole
B.A North pole
C.A positive terminal
D.A negative terminal
- 2.
What is the SI unit of magnetic flux?
A.Tesla ()
B.Henry ()
C.Gauss ()
D.Weber ()
- 3.
Lenz's law is a direct consequence of the law of conservation of:
A.Energy
B.Charge
C.Linear Momentum
D.Mass
Download the worksheet for Electromagnetic Induction - Faraday’s and Lenz’s Laws to practice offline. It includes additional chapter-level practice questions.
Motional EMF
SubtopicMotional EMF under Electromagnetic Induction for Grade 12 CBSE.
Preview questions (no answers)
- 1.
A conductor rod is moving parallel to the lines of force in a uniform magnetic field. The induced EMF developed across its ends is:
A.Maximum
B.Minimum but non-zero
C.Zero
D.Infinite
- 2.
A horizontal wire long is moving vertically downwards with a speed of in a horizontal magnetic field of . What is the magnitude of the induced EMF in the wire?
A.B.C.D. - 3.
According to Fleming's Right-Hand Rule, which finger represents the direction of the induced current?
A.Thumb
B.Forefinger
C.Middle finger
D.Little finger
Download the worksheet for Electromagnetic Induction - Motional EMF to practice offline. It includes additional chapter-level practice questions.
Self and Mutual Induction
SubtopicSelf and Mutual Induction under Electromagnetic Induction for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The process by which an e.m.f. is induced in a secondary coil due to the varying current in a primary coil is known as:
A.Self-induction
B.Mutual induction
C.Eddy currents
D.Hysteresis
- 2.
If the number of turns in a long solenoid is doubled while keeping its length and cross-sectional area constant, its self-inductance becomes:
A.Half
B.Double
C.Four times
D.Eight times
- 3.
Self-induction of a coil is often referred to as the 'Inertia of Electricity' because it:
A.Opposes any change in the current flowing through it
B.Accelerates the flow of electrons in a vacuum
C.Stores energy in the form of an electric field
D.Does not allow current to flow at all
Download the worksheet for Electromagnetic Induction - Self and Mutual Induction to practice offline. It includes additional chapter-level practice questions.