Assertion (A) & Reason (B) MCQ

MCQ 11 Mark

Assertion (A) A white light consists of seven different colours.
Reason (R) When a white light passes through a prism, it splits into seven colours.

✓
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

Correct option: A.

Both A and R are true and R is the correct explanation of A.

(A) Both A and R are true and R is the correct explanation of A.
Explanation: A white light consists of seven different colours. That's why, it splits into seven colours when it passes through a prism.

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MCQ 21 Mark

Assertion (A) Concave mirrors are used as a shaving mirror in barber shop.
Reason (R) Concave mirror forms enlarged image of the object when it is placed very close to the object.

✓
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

Correct option: A.

Both A and R are true and R is the correct explanation of A.

(A) Both A and R are true and R is the correct explanation of A.
Explanation: Concave mirror forms enlarged image of the object when it is placed very close to the object that's why it is used as a shaving mirror or by dentist.

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MCQ 31 Mark

Assertion (A) A plane mirror forms a virtual and erect image.
Reason (R) The size of image is diminished than the size of object in plane mirror.

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
✓
A is true but R is false.
D
A is false but R is true.

Answer

Correct option: C.

A is true but R is false.

(C) A is true but R is false.
Explanation: A plane mirror forms a virtual, erect and same size image as that of object.

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MCQ 41 Mark

Assertion (A) Light cannot visible through a bent rubber pipe.
Reason (R) Light travels in a straight path.

A
Both A and R are true and R is the correct explanation of A.
✓
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

Correct option: B.

Both A and R are true but R is not the correct explanation of A

(B) Both A and R are true but R is not the correct explanation of A.
Explanation: Light travels in a straight line, so it cannot be visible through a bent pipe.

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MCQ 51 Mark

Assertion (A) The image which is formed behind the mirror is called virtual image
Reason (R) When the light rays meet virtually, then it forms virtual image.

✓
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

Correct option: A.

Both A and R are true and R is the correct explanation of A

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MCQ 61 Mark

Assertion (A) During the formation of rainbow, the light splits into its seven constituent colours.
Reason (R) Air has lots of suspended dust particles in it.

A
Both A and R are true and R is the correct explanation of A
✓
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

Correct option: B.

Both A and R are true but R is not the correct explanation of A.

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Science Assertion (A) & Reason (B) MCQ

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