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Capacitance and Dielectrics for GUJCET: 23 solved questions

Real GUJCET paper questions on capacitance and dielectrics, part of electric potential and capacitance. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2026. No sign-in needed to read them.

What this topic asks

• Capacitance of a conductor and a capacitor — 9 questions
• Dielectric slab — 8 questions
• Polarisation and bound charge — 6 questions

All 23 questions with solutions

• To increase the charge on the plates of a capacitor means . GUJCET 2007
• 64 small drops of water having the same charge and the same radius are combined to form one big drop. The rat… GUJCET 2008
• The unit of polarizability of a molecule is . GUJCET 2018
• The unit of intensity of polarization is . GUJCET 2019
• If the relative permittivity of a substance is 80, then its electric susceptibility is . GUJCET 2020
• Which of the following options is the pair of polar molecules? GUJCET 2021
• A slab of material of dielectric constant 3 has the same area as the plates of a parallel plate capacitor but… GUJCET 2022
• A parallel plate capacitor with air between the plates has a capacitance of 4 pF. If the distance between the… GUJCET 2024
• A parallel plate capacitor with air between the plates has a capacitance of 1.0 pF. If the distance between t… GUJCET 2026
• If a capacitor of capacitance 600 μF is charged at a uniform rate of 50 μC s⁻¹, what is the time required to… GSEB Board July 2015
• A parallel plate capacitor is charged and then isolated. Now a dielectric slab is introduced in it. Which of… GSEB Board July 2016
• For a capacitor the distance between the two plates is 5x and the electric field between them is E₀. Now a di… GSEB Board July 2016
• If a capacitor of capacitance 1200 μF is charged at a uniform rate of 100 μC s⁻¹, what is the time required t… GSEB Board March 2018
• For a capacitor the distance between the two plates is 4x and the electric field between them is E₀. Now a di… GSEB Board March 2019
• The value of the dielectric strength of air is V m⁻¹. GSEB Board March 2020
• The capacitance of a parallel-plate capacitor with vacuum is 5 μF. If a dielectric slab with K = 1.5 is inser… GSEB Board August 2020
• m² is the area of a parallel plate capacitor having capacitance 8.85 μF, whose plates are kept at a distance… GSEB Board August 2020
• In a parallel plate capacitor, the area of each plate is A=1 m² and the distance between the two plates is d=… GSEB Board July 2021
• If ⃗P is the polarisation of a linear isotropic dielectric and ⃗E is the electric field, then the electric su… GSEB Board July 2022
• When a dielectric is placed in a uniform electric field, the electric dipole moment produced per unit volume… GSEB Board July 2023
• In a parallel plate capacitor of capacitance 1 μF, the intervening medium between the plates is vacuum. The a… GSEB Board July 2023
• The capacitance of a parallel plate capacitor formed by circular plates of diameter 4.0 cm is equal to the ca… RS Academy GUJCET booklet
• In the following table, the area of the plates and the separation between the plates are given for three capa… RS Academy GUJCET booklet