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class-4-Work, Force and Energy-1 1 / 20 The following is a diagram of a simple electromagnet. How could this electromagnet be made stronger ? Remove all the coils and the nail Reverse the poles of the magnet Add more coils of wire to the nail Use a smaller battery 2 / 20 The works by using fuel derived from living and dead biological organisms. Hydroelectric Wind Energy Solar Energy Biofuel 3 / 20 When we throw a ball into the air, it falls back. The force responsible for this is: Mechanical force Gravitational force Friction force Muscular force 4 / 20 A ________ jet travels faster than sound. Fighter planes Aircraft All of the above Supersonic 5 / 20 Look at the lever below. Which object has the similar working principle as the above leves. A C D B 6 / 20 Mark the action in which work is being done: A computer running a program Carrying a rucksack to school A man trying to open the door A vehicle warming up its motor 7 / 20 Electricity traveling through a wire is an example of A force applied by a simple machine Earth's gravitational pull on an object Energy being transferred from place to place Energy flowing through the water cycle 8 / 20 In which of the following situations no work is done ? A child slides down a playground slide A spaceship moves at constant velocity You slam on the brakes and your car stops quickly You push on a heavy box but cannot move it 9 / 20 These products of nature are limited. Resources such as coal and oil are which means that when they are gone, nature cannot make them again. It is very important to limit their use and find other resources to replace them. Replaceable Nonrenewable Unlimited Usable 10 / 20 Rahul is applying force on a moving object in the same direction, the speed of the object: Increases Sometime decreases and sometime increases Remains the same Decreases 11 / 20 As defined in physics, work is done: When an object stops When an object is stationary When an object moves A and C both 12 / 20 What happens to the total energy of a moving object if all the applied forces are conserved? It increases It decreases It remains constant The velocity is required to answer this question 13 / 20 Air pressure is measured with a(n) Barometer Anemometer Thermometer Psychrometer 14 / 20 While walking, some or all of the following types of energy and work are involved: Mechanical and kinetic energies Kinetic energy, potential energy and work done by the body's weight Potential energy and the work done by the force that moves the body Kinetic energy, potential energy, work done by forces excluding the body's weight and work lost through friction 15 / 20 Why we sprinkle talcum powder on a carom board? To reduce elastic force To reduce muscular energy To reduce frictional force To reduce gravitational force 16 / 20 In which of these activities, the sense of hearing is least important? C D B A 17 / 20 Two girls playing table tennis. First girl hit the ball over the net and at a Point say 'T', the other girl hit it back with a lot of force. What would happen at point 'T'? 1) The force caused a change in the size of the ball. 2) The force caused a change in the direction of the ball. 3) The force caused the ball to stop moving 2 1 and 3 both 1 1 and 2 both 18 / 20 Look at the following picture carefully. First identify the picture. The machine is a combination of two simple machines. Which simple machines combine to make it? Wheel, axle and gears Gears Lever and gears Pulley and lever 19 / 20 If the resultant force acting on a body of constant mass is zero, the body's momentum is: Constant Increasing Decreasing Always zero 20 / 20 Choose the wrong statement among followings Acoustics is the science and technology of energy The loudness of sound is measured in decibels (Db) All of the above statements are incorrect Sounds vary in three ways : volume (loud or soft), pitch (high or low), and timbre (quality) Your score is The average score is 25% 0% Restart quiz
class-4-Work, Force and Energy-1
1 / 20
The following is a diagram of a simple electromagnet.
How could this electromagnet be made stronger ?
2 / 20
The works by using fuel derived from living and dead biological organisms.
3 / 20
When we throw a ball into the air, it falls back. The force responsible for this is:
4 / 20
A ________ jet travels faster than sound.
5 / 20
Look at the lever below.
Which object has the similar working principle as the above leves.
6 / 20
Mark the action in which work is being done:
7 / 20
Electricity traveling through a wire is an example of
8 / 20
In which of the following situations no work is done ?
9 / 20
These products of nature are limited. Resources such as coal and oil are which means that when they are gone, nature cannot make them again. It is very important to limit their use and find other resources to replace them.
10 / 20
Rahul is applying force on a moving object in the same direction, the speed of the object:
11 / 20
As defined in physics, work is done:
12 / 20
What happens to the total energy of a moving object if all the applied forces are conserved?
13 / 20
Air pressure is measured with a(n)
14 / 20
While walking, some or all of the following types of energy and work are involved:
15 / 20
Why we sprinkle talcum powder on a carom board?
16 / 20
In which of these activities, the sense of hearing is least important?
17 / 20
Two girls playing table tennis. First girl hit the ball over the net and at a Point say 'T', the other girl hit it back with a lot of force. What would happen at point 'T'?
1) The force caused a change in the size of the ball. 2) The force caused a change in the direction of the ball. 3) The force caused the ball to stop moving
18 / 20
Look at the following picture carefully. First identify the picture. The machine is a combination of two simple machines. Which simple machines combine to make it?
19 / 20
If the resultant force acting on a body of constant mass is zero, the body's momentum is:
20 / 20
Choose the wrong statement among followings
Your score is
The average score is 25%
Restart quiz
class-4-Work, Force and Energy -2 1 / 10 As you go up a mountain top, your weight : Decreases slightly Increases sharply Increases slightly Remains exactly the same 2 / 10 The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the : Coolant/moderator Control rod Cooling tower Reactor 3 / 10 Which of these contain(s) an electromagnet ? Electric stove Headphones Lamp Compass 4 / 10 The mechanical energy of a freely falling object is the difference Between its potential energy and its kinetic energy Between its potential energy and its gravitational energy Between its friction energy and its potential energy None of the above 5 / 10 Which of the following gadget is used to measure temperature? Scale Stop watch Thermometer Measuring jar 6 / 10 To measure the weight of milk, which of the following units can be used ? Milligram Millilitre Fahrenheit Seconds 7 / 10 Blow at a plastic toy windmill and then hold it under a tap from which water is dripping. Which of the following, this activity is trying to show ? That only wind possesses energy That tap and wind blown passess energy That wind and flowing water possess energy That moving air and moving water does not possess energy 8 / 10 A calorimeter is used for : Store the heat from a chemical reaction None of these Determine the heat given off/absorbed during some process Determine the heat of a reaction 9 / 10 What is Nuclear Energy ? Energy that travels in waves Energy that is from solar panels The kinetic energy of moving electrons Energy that is locked in the nucleus of an atom 10 / 10 Which of the following is NOT an SI unit of measure ? Newton Joule Hertz Watt Your score is The average score is 35% 0% Restart quiz
class-4-Work, Force and Energy -2
1 / 10
As you go up a mountain top, your weight :
2 / 10
The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the :
3 / 10
Which of these contain(s) an electromagnet ?
4 / 10
The mechanical energy of a freely falling object is the difference
5 / 10
Which of the following gadget is used to measure temperature?
6 / 10
To measure the weight of milk, which of the following units can be used ?
7 / 10
Blow at a plastic toy windmill and then hold it under a tap from which water is dripping. Which of the following, this activity is trying to show ?
8 / 10
A calorimeter is used for :
9 / 10
What is Nuclear Energy ?
10 / 10
Which of the following is NOT an SI unit of measure ?
The average score is 35%
