CBSE Class 12 Electrostatic Potential and Capacitance Multiple Choice Questions with Answers. MCQ Questions Class 12 Electrostatic Potential and Capacitance with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Electrostatic Potential and Capacitance MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 Electrostatic Potential and Capacitance with Answers - Set - 1
Question 1:
The capacity of an isolated conducting sphere of radius r is proportional to:
(a) r2
(b) 1/r
(c) 1/r2
(d) r
Correct Answer – (D)
Question 2 :
A number of capacitors, each of capacitance 1 µF and each one of which gets punctured if a potential difference just exceeding 500 V is applied are provided. Then an arrangement suitable for giving a capacitor of capacitance 3 µF across which 2000 V may be applied requires at least:
(a) 4 component capacitors.
(b) 48 component capacitors.
(c) 3 component capacitors.
(d) 12 component capacitors.
Correct Answer – (B)
Question 3 :
A parallel plate air capacitor is given a charge of 3 µC. A sheet of dielectric constant 3 is inserted so that it completely fills the gap between the plates. The induced charge on each face of the sheet is numericaly:
(a) 2 µC
(b) 3 µC
(c) 0
(d) 9 µC
Correct Answer – (A)
Question 4 :
Electric potential V due to an electric dipole is related to the distance r of the observation point as:
(a) V ∝ r
(b) V ∝ r-1
(c) V ∝ r²
(d) V ∝ r-2
Correct Answer – (D)
Question 5 :
A charge q is distributed over two spheres of radii r1 and r2 such that their surface densities are equal. What is the ratio of their potential.
(a) r1/r2
(b) (r1)2/r2
(c) (r1)3/r2
(d) none of these
Correct Answer – (A)
MCQ Questions Class 12 Electrostatic Potential and Capacitance with Answers
Question 6 :
Five equal capacitors, each with capacitance C are connected as shown. The equivalent capacitance between A and B is.
(a) 5 C
(b) C
(c) C/5
(d) 3C.
Correct Answer – (B)
Question 7 :
Three capacitors of capacitances 3µF, 9µF and 18 µF are conected once in series and then in parallel. The ratio of equivalent capacitances Cs/Cp will be:
(a) 1 : 15
(b) 15 : 1
(c) 1 : 1
(d) 1 : 3
Correct Answer – (A)
Question 8 :
Two insulated charged spheres of radii 20 cm and 25 cm respectively and having an equal charge q are connected by a copper wire and then they are separated.
(a) Both spheres will have the same charge q.
(b) Charge on sphere of radius 20 cm will be more than that of radius 25 cm.
(c) Charge on sphere of radius 20 cm will be lesser than that of 25 cm.
(d) Charge on each will be zq.
Correct Answer – (C)
Question 9 :
A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of sphere is:
(a) Zero
(b) 10 V
(c) 5 V
(d) 10/3 V
Correct Answer – (B)
Question 10 :
Dielectric strength of a medium is 2 KV mm-1. What is the maximum potential difference that can be set up across a 50 µm specimen without puncturing it.
(a) 10 V
(b) 100 V
(c) 1000 V
(d) 10,000 V
Correct Answer – (B)
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