11th Class Physics Chapter 2 MCQs

11th Class Physics Chapter 2 MCQs

Tich the correct option.

1) The number of perpendicular components of a force (in 2-D) are:

A) 1

B) 2

C) 3

D) 4

Correct option is (b)

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2)

$$\widehat{j\;}\;\times\;\widehat i\;=\;\_\_\_\_\_\_\_\_$$

A) 0

B) 1

$$C)\;\widehat k\\D)\;-\widehat k\;$$

Correct option is (d)

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3) A force of 10 N is making an angle of 30 degree with the horizontal. Its x-component will be:

A) 4 N

B) 5 N

C) 7 N

D) 8.7 N

Correct option is (d)

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4) If two forces of magnitude 3 N and 4 N are acting at right angle to each other than their resultant force will be:

A) 7 N

B) 5 N

C) 1 N

D) Null vector

Correct option is (b)

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5) Angle between two vectors A and B can be easily determined by:

A) dot product

B) cross product

C) head to tail rule

D) right hand rule

Correct option is (a)

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6) For which angle the equation

$$\vert\;A.B\;\vert\;=\;\vert\;A\times B\;\vert$$

is correct?

A) 30 degree

B) 45 degree

C) 60 degree

D) 90 degree

Correct option is (b)

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