Question

Choose the odd one out in the following:- displacement, velocity,speed,average speed.

displacement

velocity

speed

average speed



10. Which device is used for measuring weight?

beam balance

physical balance

spring balance

all of these



11. Choose odd one out in the following:- force, weight, acceleration,energy.

force

weight

acceleration

energy

Required

12. Brownian motion is the example of ______ motion.

complex

rotatory

random

all of this

Required

13. SI unit of frequency is_________.

hartz

Pascal

Kelvin

metre

Required

14. The following is a characteristic property of a substance.

volume

wait

density

none of these

Required

15. Choose odd one out in the following:- hydrometer,lactometer ,density bottle, physical balance.

hydrometer

lactometer

density bottle

physical balance

Required

16. When a substance is heated its density __________.

increases

decreases

remains same

first increases then decreases

Required

17. Mass is measured by using spring balance.

True

False

Required

18. Find the mass of 2 litres of alcohol in kg when density of alcohol is 0.8 gram per centimetre cube.

16 kg

1.6 kg

1600 kg

0.16 kg

Required

19. The space occupied by an object is called its_______.

area

capacity

volume

speed

Required

20. The density of gold is______kg/cubic metre.

19300

27400

8000

13600

Required

21. Name the device which is designed to test the purity of milk.

hydrometer

manometer

barometer

lactometer

Required

22. Equal volumes of iron and Aluminium have _______masses.

same

equal

different

none of these

Required

23. Rotation of earth is a periodic motion.

True

False

Required

24. All oscillatory motions are________.

periodic

non periodic

uniform

all of these

Required

25. Calculate the weight of a body of mass 13 kg and g=10m/square second.

13 Newton

130 Newton

1300 Newton

13000 Newton

Required

26. A flying mosquito is an example of_____.

random motion only

combination of motion only

both random in combination motion

linear motion only

Required

27. The number of vibrations or oscillations made by a pendulum in one second is called________.

amplitude

frequency

time period

oscillation

Required

28. Which of the following terms are related to each other.

scalar and vector

distance and displacement

speed and velocity

rest and motion

Required

29. Unit of force in CGS system is_______.

joule

dyne

Pascal

Celsius

Required

30. A hammer of mass 2 kg is raised to a height of 3m.What will be its potential energy?

588 J

5.88 J

58.8 J

580 J

Required

31. Water cycle is caused due ____ energy.

air

water

solar

thermal

Required

32. A firecracker converts chemical energy into sound ,light and heat energy.

sound energy

light energy

heat energy

all of these

Required

33. Name the device that change sound energy into electrical energy.

mobile

loudspeaker

gramophone

microphone

Required

34. Name a device that change mechanical energy into electrical energy

dynamo

solar cooker

geyser

all of these

Required

35. Name a device that change heat energy into electrical energy.

thermoelectric power stations

room heater

electric bell

stereo system

Required

36. Which of the following device change chemical energy into mechanical energy?

car

bus

truck

all of these

Required

37. Which of the following are fossil fuels?

coal

petroleum

both of these

none of these

Required

38. Which is the example of renewable source of energy?

petroleum

kerosene

biomass

LPG

Required

39. Energy chain consists of______.

solar energy

chemical energy

heat energy

all of these

Required

40. Potential energy of a person is minimum when-

he is standing

he is sitting on chair

he is sitting on the ground

he is lying on the ground

Required


​

Answer 1

Answer:

speed

Explanation:

this is the correct answer