Electromagnetic Waves and their Characteristics NEET Questions

Physics - Electromagnetic Waves

Electromagnetic Waves and their Characteristics MCQ Questions


1.
Who introduced the concept of displacement current to remove the inconsistency in Ampere's circuital law?
A.
André-Marie Ampère
B.
James Clerk Maxwell
C.
Michael Faraday
D.
Heinrich Hertz
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ANSWER :
B. James Clerk Maxwell
2.
Displacement current arises due to:
A.
Time-varying magnetic field
B.
Time-varying electric field
C.
Flow of electrons through a conductor
D.
Steady electric field
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ANSWER :
B. Time-varying electric field
3.
The displacement current is given by the formula:
A.
id = μ₀ (dΦB/dt)
B.
id = ε₀ (dΦE/dt)
C.
id = μ₀ε₀ (dΦE/dt)
D.
id = ε₀ (dΦB/dt)
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ANSWER :
B. id = ε₀ (dΦE/dt)
4.
The modified Ampere's circuital law (Ampere-Maxwell law) is given by:
A.
∮B·dA = 0
B.
∮B·dl = μ₀ic + μ₀ε₀(dΦE/dt)
C.
∮E·dl = -dΦB/dt
D.
∮B·dl = μ₀ic
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ANSWER :
B. ∮B·dl = μ₀ic + μ₀ε₀(dΦE/dt)
5.
Inside an ideal parallel plate capacitor being charged, which current exists?
A.
Only conduction current
B.
Neither
C.
Both conduction and displacement current equally
D.
Only displacement current
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ANSWER :
D. Only displacement current
6.
A parallel plate capacitor is being charged with a current of 2 A. The displacement current between the plates is:
A.
4 A
B.
2 A
C.
1 A
D.
0 A
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ANSWER :
B. 2 A