Class 12 Physics Chapter 1 objective type / mcq question answer of Electric Charges and Fields NCERT Solution in Hindi. NCERT Class 12 Physics MCQ Question Answer and Important Question Answer, Textual Question answer also Available for Various Board Students like HBSE, CBSE, UP board, Mp Board, RBSE and some other State Boards.
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NCERT Solution for Class 12 Physics Chapter 1 Electric Charges and Fields MCQ Question Answer.
Electric Charges and Fields Class 12 MCQ Question Answer
1. Two charges +1µC and +4µC are situated at a distance in air. The ratio of forces acting on them is :
(A) 1:4
(B) 4:1
(C) 1:1
(D) 1 : 16
Answer
Ans. (D) 1 : 16
2. Process of sharing the charges with the earth is called
(A) conduction
(B) insulation
(C) earthing
(D) charging
Answer
Ans. (C) earthing.
3. SI unit of k (proportionality constant in coulomb’s law) is :
(A) N1 C-2/m2
(B) Nm2/C2
(C) N-1C2m2
(D) N-1C2m1
Answer
Ans. (A) N1 C-2/m2.
4. Quantization of charge was experimentally demonstrated by …..in 1912.
(A) Millikan
(B) Albert Einstein
(C) lavioser
(D) Niels bohr
Answer
Ans. (A) Millikan
5. There are about …….. electrons in a charge of -1 coulomb.
(A) 0
(B) 1
(C) 1.6 x 1019
(D) 6.24×1018
Answer
Ans. (D) 6.24×1018
6.Nature of electric force between two protons is:
(A) Attractive
(B) Neutral
(C) Repulsive
(D) None of the above.
Answer
Ans. (C) Repulsive
7. The force of repulsion between two positively charged particles is F. When distance between them is made one fourth, what will be the value of this force ?
(A) four times
(B) two times
(C) half
(D) sixteen times
Answer
Ans. (D) sixteen times
8. The force of repulsion between two negatively charged particles is F. When distance between them is halved, what will be the value of this force ?
(A) four times
(B) two times
(C) half
(D) sixteen times
Answer
Ans. (A) four times
9. The charge on an atom is:
(A) 0 C
(B) 1 C
(C) 1.6 x 10-19 C
(D) — 1.6×10-19 C
Answer
Ans. (A) 0 C
10. The charge on a neutron is :
(A) 0 C
(B) 1.6x 10-19 C
(C)-1.6×10 C
(D) 1 C
Answer
Ans. (A) 0 C
11. The charge on an Proton is :
(A) O C
(B) 1 C
(C) 2.6 x 1019 C
(D) + 1.6 x 10-19 C
Answer
Ans. (D) + 1.6 x 10-19 C
12. SI unit of electric charge is :
(A) Ampere
(B) Coulomb
(C) Volt
(D) None.
Answer
Ans. (B) Coulomb