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Physics Assertion (A) & Reason (B) MCQ

Model Paper 4 · Rajasthan Board (RBSE) STD 11 Science (Rajasthan - English Medium). 4 questions.

Questions

Assertion (A) & Reason (B) MCQ

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4 questions · self-marked practice — reveal the answer and mark yourself.

MCQ 11 Mark
Assertion: An artificial satellite is moving in a circular orbit of the earth. If the gravitational pull suddenly disappears, then it moves with the same speed tangential to the original orbit.
Reason: The orbital speed of a satellite decreases with the increase in radius of the orbit.
  • A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
  • B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  • C
    Assertion is correct statement but reason is wrong statement.
  • D
    Assertion is wrong statement but reason is correct statement.
Answer
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MCQ 21 Mark
Assertion (A): Two particle of different mass, projected with same velocit, the maximum height attained by both the particle will be same.
Reason (R): The maximum height of projectile is independent of patricle mass. is equal to maximum height attained by projectile.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
(a) Both A and R are true and R is the correct explanation of A .
Explanation: The maximum height to which a projectile rises above the point of projection is, $H=\frac{u^2 \sin ^2 \theta}{2 g}$, which is independent of mass.
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MCQ 31 Mark
Assertion (A): Work done over a closed path is always zero.
Reason (R): No force is required in a closed path.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
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MCQ 41 Mark
Assertion (A): A gas has a unique value of specific heat.
Reason (R): Specific heat is defined as the amount of heat required to raise the temperature of unit mass of the substance through unit degree.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.
Answer
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