11)

Zero vector is also called as

Class 11 Physics

A)

Null vector

B)

Unit vector

C)

Point vector

D)

None

12)

The direction of zero or null vector is

Class 11 Physics

A)

Both a and b

B)

Not specified

C)

Specified

D)

Not confirm

13)

The vector having unit magnitude is called as

Class 11 Physics

A)

Zero vector

B)

Null vector

C)

Unit vector

D)

None

14)

The unit vectors i, j, k which are along the X, Y and Z axes respectively are

Class 11 Physics

A)

None

B)

Perpendicular to each other

C)

Parallel to each other

D)

Both a and b

15)

The direction of velocity at any point on the path of an object is

Class 11 Physics

A)

Tangential to the path

B)

Parallel to the path

C)

Perpendicular to the path

D)

None

16)

An object that is in flight after being thrown or projected is called

Class 11 Physics

A)

Projectile

B)

Scalar

C)

Vector

D)

None

17)

If the motion of particle along circular path is with constant speed then the motion is called as

Class 11 Physics

A)

Rectilinear motion

B)

Uniform circular motion

C)

Non uniform circular motion

D)

None

18)

The acceleration of an object moving with speed v in a circle of radius R has magnitude

Class 11 Physics

A)

VR

B)

V2/R

C)

V/R

D)

V/R2

19)

The acceleration of the particle directed towards the centre of circle is called as

Class 11 Physics

A)

Both a and b

B)

Centripetal acceleration

C)

Centrifugal acceleration

D)

None

20)

The unit vector associated with vector A is given by

Class 11 Physics

A)

|A| /A

B)

A/ |A|

C)

A/ A

D)

None