Class -XI

1.The word Science originates from the Latin verb Scientia meaning

(a) to know

(b) to see

(c) to experience

(d) to observe

2.The dimensions of kinetic energy is

(a) [M 2L2T]

(b) [ML 2T]

(c) [ML 2T-2]

(d) [ML 2T-1]

3.The dimensions of kinetic energy is same as that of

(a) force

(b) pressure

(c) work

(d) momentum

4.The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is

(a) 64 m³

(b) 216 m³

(c) 512 m³

(d) 196 m³

5.Light year is a unit of

(a) time

(b) distance

(c) sunlight intensity

(d) mass

6.Which one of the following is the unit of velocity?

(a) kilogram

(b) metre

(c) m/s

(d) second

7.The dimensional formula for velocity is

(a) [LT]

(b) [LT-1]

(c) [L2T]

(d) [L-1T]

8.The dimensional formula for acceleration is

(a) [LT2]

(b) [LT-2]

(c) [L2T]

(d) [L2T2]

9.Which of the following changes when a particle is moving with uniform velocity?

(a) Speed

(6) Velocity

(c) Acceleration

(d) Position 

10. Rate of change of displacement is called

(a) Speed

(b) Deceleration

(c) Acceleration

(d) Velocity

11.Acceleration is a vector quantity, which indicates that its value

(a) Is always negative

(b) Is always positive

(c) Is zero

(d) Can be positive, negative or zero

12. An object travels 40m in 5 sec and then another 80m in 5 sec. What is the average speed of the object?

(a) 12 m/s

(b) 6 m/s

(c) 2 m/s

(d) 0 m/s

13 SI Unit of measurement of acceleration is

.

(a) m/s

(b) m/s2

(c) m/hr

(d) M

14.The dimensional formula for speed is

(a) T-1

(b) LT-1

(c) L-1T-1

(d) L-1T

15 From the given Velocity-Time graph (figure)

 it can be inferred that the object is moving with

(a) Non uniform velocity

(b) moving with uniform acceleration

(c) At rest

(d) Uniform velocity