Check CBSE Class 12 Physics answer key. Students who appeared for Term 1 CBSE Class 12 Physics board exam 2021-22 are seeking CBSE Class 12 Physics Term 1 Answer Key 2021. It is available here along with the question paper of Term 1 CBSE Class 12 Physics board exam 2021-22. Students who appeared for CBSE 12th Physics board exam 2021-22 said that questions in the paper were tricky and the difficulty level was moderate. One can check the question paper & review of students from the link given below
⇰ CBSE 12th Physics Board Exam 2021-22 (Term 1): Moderately Difficult - Check Paper Analysis, Review, Answer Key & Latest Updates
⇰ Download CBSE Class 12 Physics Term 1 Board Exam 2021-22 Question Paper (PDF)
CBSE Answer Key 2021-22: Class 12 Physics (Term 1) CBSE Board Exam 2021-22
Q1. A negatively charged object X is repelled by another charged object Y. However, an object Z is attracted to object Y. Which of the following is the best possibility for the object Z?
(a) positively charged only
(b) negatively charged only
(c) neutral or positively charged
(d) neutral or negatively charged
Answer:
(c)
2. In an experiment three microscopic latex spheres are sprayed into a chamber and became
charged with charges +3e, +5e and −3e respectively. All the three spheres came in contact
simultaneously for a moment and got separated. Which one of the following are possible values for the final charge on the spheres?
(a) +5e, −4e, +5e
(b) +6e, +6e, −7e
(c) −4e, +3.5e, +5.5e
(d) +5e, −8e, +7e
Answer:
(b)
3. An object has charge of 1 C and gains 5.0 x 10^18 electrons. The net charge on the object becomes-
(a) −0.80 C
(b) +0.80 C
(c) +1.80 C
(d) +0.20 C
Answer:
(d)
4. Kirchhoff's first rule ΣI = 0 and second rule ΣIR = ΣE (where the symbols have their usual meanings) are respectively based on -
(a) conservation of momentum and conservation of charge
(b) conservation of energy, conservation of charge
(c) conservation of charge, conservation of momentum
(d) conservation of charge, conservation of energy
Answer: (d)
5. The electric power consumed by a 220 V - 100 W bulb when operated at 110 V is
(a) 25 W
(b) 30 W
(c) 35 W
(d) 45 W
Answer:
(a)
6. Which of the following has a negative temperature coefficient of resistivity?
(a) metal
(b) metal and semiconductor
(c) semiconductor
(d) metal and alloy
Answer: (c)
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