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 - 5
Question 1:
n identical capacitors joined in parallel are charged to a common potential V. The battery is disconnected. Now, the capacitors are separated and joined in series. For the new combination:
(a) energy and potential difference both will remain unchanged
(b) energy will remain same, potential difference will become nV
(c) energy and potential both will become n times
(d) energy will become n times, potential difference will remain V.
Correct Answer – (B)
Question 2 :
Electric potential of earth is taken to be zero, because earth is a good
(a) insulator
(b) conductor
(c) semi-conductor
(d) dielectric
Correct Answer – (B)
Question 3 :
On moving a charge of 20 C by 2 cm, 2 J of work is done. Then the potential difference between the points is
(a) 0.1 V
(b) 8 V
(c) 2 V
(d) 0.5 V
Correct Answer – (A)
Question 4 :
A bullet of mass 2 g is having a charge of 2 μC. Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s ?
(a) 5 kV
(b) 50 kV
(c) 5 V
(d) 50 V
Correct Answer – (B)
Question 5 :
A uniform electric field of 10 NC-1 exists in the vertically downward direction. What is the increase in the electric potential asonegoes up through a height of 300 cm ?
(a) 15 V
(b) 30 V
(c) 45V
(d) None of these
Correct Answer – (B)
MCQ Questions Class 12 Electrostatic Potential and Capacitance with Answers
Question 6 :
A positively charged particle is released from rest in an uniform electric field. The electric potential energy of the charge
(a) remains a constant because the electric field is uniform.
(b) increases because the charge moves along the electric field.
(c) decreases because the charge moves along the electric field.
(d) decreases because the charge moves opposite to the electric field.
Correct Answer – (C)
Question 7 :
In brining an electron towards another electron, the electrostatic potential energy of the system
(a) increases
(b) decreases
(c) remains unchanged
(d) becomes zero
Correct Answer – (A)
Question 8 :
Two identical metal plates, separated by a distance d form a parallel-plate capacitor. A metal sheet of thickness d/2 is inserted between the plates. The ratio of the capacitance after the insertion of the sheet to that before insertion is
(a) 2 :1
(b) 2 : 1
(c) 1 : 1
(d) 1 : 2
Correct Answer – (B)
Question 9 :
The electric potential of earth is taken as:
(a) zero
(b) infinity
(c) unity
(d) None of these
Correct Answer – (A)
Question 10 :
What is the number of electrons in 100 g water?
(a) 3.35 × 1024
(b) 3.35 × 1025
(c) 6.02 × 1023
(d) None of these
Correct Answer – (A)
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