Q28. When a capacitor is subjected to a D.C. source it takes small time internal to get fully charge

Q: What is the correct answer for CUET UG Physics Q28?

The correct answer is b. When a capacitor is charging, charge accumulates on its plates, creating an electric field within the dielectric between the plates. While there is no actual flow of charge through the dielectric material itself, the electric field (E) between the plates is continuously changing as the charge on the plates builds up. According to Maxwell's concept of displacement current, a changing electric field

Q: Q28. When a capacitor is subjected to a D.C. source it takes small time internal to get fully charged up. During this small-time interval there is no passage of charge through dielectric, yet we use…

The correct answer is b. When a capacitor is charging, charge accumulates on its plates, creating an electric field within the dielectric between the plates. While there is no actual flow of charge through the dielectric material itself, the electric field (E) between the plates is continuously changing as the charge on the plates builds up. According to Maxwell's concept of displacement current, a changing electric field

Q: What are the options for this CUET UG Physics question?

A. There is a slow motion of charge from one plate to another · B. There is a continues change of electric field between plates and hence electric flux · C. The electric charge from battery stops moving · D. There is temporary breakdown of dielectric

Question

Q28. When a capacitor is subjected to a D.C. source it takes small time internal to get fully charged up. During this small-time interval there is no passage of charge through dielectric, yet we use a term displacement current. This term is used because:
(a) There is a slow motion of charge from one plate to another
(b) There is a continues change of electric field between plates and hence electric flux
(c) The electric charge from battery stops moving
(d) There is temporary breakdown of dielectric

FirstInTest · Accepted Answer

When a capacitor is charging, charge accumulates on its plates, creating an electric field within the dielectric between the plates. While there is no actual flow of charge through the dielectric material itself, the electric field (E) between the plates is continuously changing as the charge on the plates builds up. According to Maxwell's concept of displacement current, a changing electric field gives rise to a displacement current (Id = ε₀ * dΦE/dt), where ΦE is the electric flux. This displacement current ensures the continuity of current in the circuit, effectively 'bridging' the gap in the conduction path within the dielectric. Therefore, the term displacement current is used because there is a continuous change of electric field and, consequently, electric flux between the plates. Options (a), (c), and (d) incorrectly describe the reason for displacement current or the charging process.

Answer

There is a slow motion of charge from one plate to another

Answer

There is a continues change of electric field between plates and hence electric flux

Answer

The electric charge from battery stops moving

Answer

There is temporary breakdown of dielectric

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