Displacement Current NEET Questions

Physics - Electromagnetic Waves

Displacement Current MCQ Questions


13.
In a region of space where there is no conduction current but there is a time-varying electric field:
A.
Only electric field exists
B.
No magnetic field exists
C.
All fields are zero
D.
A magnetic field is produced by displacement current
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ANSWER :
D. A magnetic field is produced by displacement current
14.
Maxwell modified Ampere's law by adding which term?
A.
Faraday's induction term
B.
Displacement current term: μ₀ε₀(dΦE/dt)
C.
Lorentz force term
D.
Coulomb's force term
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ANSWER :
B. Displacement current term: μ₀ε₀(dΦE/dt)
15.
Displacement current does NOT involve:
A.
Permittivity of medium
B.
Actual flow of electric charges
C.
Changing electric field
D.
Magnetic field generation
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ANSWER :
B. Actual flow of electric charges
16.
The Ampere-Maxwell law is:
A.
∮B·dA = 0
B.
∮E·dl = -dΦB/dt
C.
∮B·dl = μ₀ic + μ₀ε₀(dΦE/dt)
D.
∮B·dl = μ₀ic
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ANSWER :
C. ∮B·dl = μ₀ic + μ₀ε₀(dΦE/dt)
17.
Which of the following statements about displacement current is TRUE?
A.
It exists only in metals
B.
It does not produce magnetic field
C.
It produces a magnetic field exactly like conduction current
D.
It is always greater than conduction current
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ANSWER :
C. It produces a magnetic field exactly like conduction current
18.
Displacement current can exist in:
A.
Only in vacuum
B.
Vacuum, dielectrics, and conductors with changing E field
C.
Only metallic conductors
D.
Only insulators
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ANSWER :
B. Vacuum, dielectrics, and conductors with changing E field