Kinematics-Scalars and Vectors (AIIMS Physics): Questions 7 - 10 of 12

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Question number: 7

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Appeared in Year: 1998

Assertion-Reason▾

Assertion (Ꭺ)

The dot product of one vector with another vector may be a scalar or a vector.

Reason (Ꭱ)

If the product of two vectors is a vector quantity, then product is called a dot product.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are false
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 8

» Kinematics » Scalars and Vectors » Scalar Quantity

Appeared in Year: 2000

Assertion-Reason▾

Assertion (Ꭺ)

A physical quantity can be regarded as a vector, if magnitude as well as direction is associated with it.

Reason (Ꭱ)

A physical quantity can be regarded as a scalar quantity, if it is associated with magnitude only.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 9

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

A force of (2i^+6j^) newton acts on a body and displaces it by (4i^+8j^) meter. The work done by the force is:

Choices

Choice (4) Response
a.

49 J

b.

120 J

c.

72 J

d.

56 J

Question number: 10

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

The vector P=2ai^+aj^+2k^ and Q=2ai^2j^k^ are perpendicular to each other. The positive value of a is:

Choices

Choice (4) Response
a.

3

b.

5

c.

1

d.

0

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