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MCQOPTIONS
This section includes 1489 Mcqs, each offering curated multiple-choice questions to sharpen your 8th Class knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
Which of the following is a non-contact force? |
| A. | Muscular force |
| B. | Electrostatic force |
| C. | Elastic spring force |
| D. | Frictional force |
| Answer» C. Elastic spring force | |
| 752. |
The diagram shows a simple mercury barometer. The mercury level is at a height h when the atmospheric pressure is 100000 Pa. What is the pressure at P? |
| A. | 40000 Pa |
| B. | 60000 Pa |
| C. | 100000 Pa |
| D. | 140000 Pa |
| Answer» C. 100000 Pa | |
| 753. |
Which of the following effects is caused by frictional force? |
| A. | Change in the shape of an object |
| B. | Change in the direction of the motion of an object |
| C. | Slowing down of a moving object |
| D. | Acceleration in a moving body |
| Answer» D. Acceleration in a moving body | |
| 754. |
The diagram shows an object hanging from a string. Which of the following is the correct statement about the diagram? |
| A. | The object does not fall because there is no gravity. |
| B. | The object does not fall because there is friction between the object and the string. |
| C. | The object does not fall because a magnetic force is acting on it. |
| D. | The object does not fall because the string is exerting a force against the Earth's gravity. |
| Answer» E. | |
| 755. |
Which of the following examples describe the change of shape on applying force? |
| A. | A ball being kicked |
| B. | A fan switched on |
| C. | A man jumping from a height |
| D. | Repeatedly tearing of a paper |
| Answer» E. | |
| 756. |
There are three tins filled with water and have holes of the same size as shown in figure. Which of the following options is correctly identifies true (T) and false (F) for the given statements? (i) The farthest spout is from the middle hole in case (a).(ii) The stream of water falls out the farthest through the upper hole in case (b).(iii) The farthest spout is from the lowest hole in case (c). |
| A. | (i)(ii)(iii)TTT |
| B. | (i)(ii)(iii)FTT |
| C. | (i)(ii)(iii)FFT |
| D. | (i)(ii)(iii)FFF |
| Answer» D. (i)(ii)(iii)FFF | |
| 757. |
If no force acts on a body at rest, then what effect can be observed? |
| A. | The body changes shape. |
| B. | The body moves with increased speed. |
| C. | The body remains at rest. |
| D. | The body breaks up. |
| Answer» D. The body breaks up. | |
| 758. |
A spirit level is used to determine the surface level as shown in the figure below. Position of the air bubble Why does the air bubble at the centre of the tube move to the right when the surface is inclined? |
| A. | The forces acting on the air bubble are in equilibrium. |
| B. | Unbalanced forces act on the air bubble. |
| C. | Air bubbles always rise. |
| D. | Frictional force act on the air bubble. |
| Answer» C. Air bubbles always rise. | |
| 759. |
Arrange the given pictures in ascending Br order according to the air pressure at the highest point in each case. |
| A. | (i), (ii), (iii) |
| B. | (ii), (iii), (i) |
| C. | (ii), (i), (iii) |
| D. | (iii), (ii), (i) |
| Answer» B. (ii), (iii), (i) | |
| 760. |
A The speed of a falling body increases continuously. Why? |
| A. | No force acts on the falling body. |
| B. | The falling body is very light. |
| C. | Air exerts a frictional force on the falling body. |
| D. | The force acting on the body is in the direction of the fall. |
| Answer» E. | |
| 761. |
Why is the atmospheric pressure not felt by us? |
| A. | It is small in magnitude. |
| B. | It acts only-on atmosphere and not on us. |
| C. | Our internal body pressure is equal to that of the atmospheric pressure. |
| D. | It does not act at sea level. |
| Answer» D. It does not act at sea level. | |
| 762. |
How is the weight of an astronaut in the outer space in relation with his actual weight? |
| A. | It is less than his actual weight. |
| B. | It is more than his actual weight. |
| C. | It is the same as his actual weight. |
| D. | It is zero. |
| Answer» E. | |
| 763. |
When we walk on sand our feet sink into it and it is difficult for us to walk but a camel can easily walk on sand because (i) The weight of the camel is the force that is spread over the large area covered by its feet. (ii) The pressure exerted by the camel's body on the sand is very large. |
| A. | Only (i) is correct. |
| B. | Only (ii) is correct. |
| C. | Both (i) and (ii) are correct and (ii) is the conclusion of (i). |
| D. | Both (i) and (ii) are correct and (i) is the conclusion of (ii). |
| Answer» B. Only (ii) is correct. | |
| 764. |
A force is applied on an object in the direction of its motion. What is the effect of force on the object? |
| A. | The speed of the object will increase. |
| B. | The speed of the object will decrease. |
| C. | The speed of the object will remain unchanged. |
| D. | The object comes to rest. |
| Answer» B. The speed of the object will decrease. | |
| 765. |
A book remains at rest on a table. Why? |
| A. | No force acts on it. |
| B. | There is friction between the book and the surface of the table. |
| C. | Force exerted by the book on the table is the same as the force exerted by the table on the book. |
| D. | All of the above |
| Answer» D. All of the above | |
| 766. |
Which of the following statements about the moon is NOT correct? |
| A. | The moon orbits the earth keeping the same side facing us. |
| B. | The gravitational pull of the moon causes high tides in oceans. |
| C. | The craters on the moon caused long ago still exist because the moon has no atmosphere. |
| D. | The sun lights up the complete moon at any one time. |
| Answer» E. | |
| 767. |
Which of the following is true of the man in the picture shown below? |
| A. | He is applying force on the stool. |
| B. | He represents only magnitude but no direction. |
| C. | He is not applying any force on the stool. |
| D. | The gravitational pull of earth on the stool is greater. |
| Answer» B. He represents only magnitude but no direction. | |
| 768. |
Which of the following does NOT require a force? |
| A. | Rowing of a boat |
| B. | Bursting of a balloon filled with lots of air. |
| C. | Pedalling a cycle |
| D. | Catching a moving cricket ball |
| Answer» C. Pedalling a cycle | |
| 769. |
Which of the following requires a pushing force? |
| A. | Throwing a stone |
| B. | Grabbing hold of a pencil |
| C. | Leaves falling from a tree |
| D. | A load lifted by a pulley |
| Answer» B. Grabbing hold of a pencil | |
| 770. |
A player slides a bowling ball on the lane to hit the pins. What is the effect of the force exerted on the bowling ball? |
| A. | Stops the moving bowling ball |
| B. | Changes the direction of the moving bowling ball |
| C. | Changes the shape of the moving bowling ball |
| D. | Changes the position of the stationary pins |
| Answer» E. | |
| 771. |
Which force does an archer use to pull a bow? |
| A. | Muscular force |
| B. | Magnetic force |
| C. | Gravitational force |
| D. | All of the above |
| Answer» B. Magnetic force | |
| 772. |
Why does a rubber sucker stick to a surface? |
| A. | It is the inherent property of rubber. |
| B. | Gravitational force acts on it. |
| C. | Elastic spring force acts on it. |
| D. | Atmospheric pressure acts on it. |
| Answer» E. | |
| 773. |
On what factors does the magnitude of non-contact force depend? |
| A. | Distance between two bodies |
| B. | Mass of the two bodies |
| C. | Chemical composition of the two bodies |
| D. | All of the above |
| Answer» E. | |
| 774. |
The surface area of the base of a brick X is\[\text{100 c}{{\text{m}}^{\text{2}}}\]. The surface area of the base of the brick Y is\[\text{250 c}{{\text{m}}^{\text{2}}}\]. Each brick weighs 100 N. Which of the following is correct if \[{{\text{P}}_{1}}\] and \[{{\text{P}}_{2}}\]are the pressures exerted by the bricks X and Y respectively? |
| A. | \[{{P}_{1}}={{P}_{2}}\] |
| B. | \[{{P}_{1}}>{{P}_{2}}\] |
| C. | \[{{P}_{1}}<{{P}_{2}}\] |
| D. | \[{{P}_{1}}={{P}_{2}}=0\] |
| Answer» C. \[{{P}_{1}}<{{P}_{2}}\] | |
| 775. |
Which of the following is NOT a force? |
| A. | Muscular |
| B. | Magnetic |
| C. | Chemical |
| D. | Electric |
| Answer» D. Electric | |
| 776. |
Why do deep sea divers use a special suit for diving? |
| A. | To maintain their body temperature in cold sea water |
| B. | To protect against sea animals |
| C. | To counter balance the pressure in the sea. |
| D. | To keep them dry |
| Answer» D. To keep them dry | |
| 777. |
Four forces are acting on a body. If the body does not change its position or shape/then what does it mean? |
| A. | Forces are similar acting in the same direction. |
| B. | Forces are parallel and opposite. |
| C. | Forces add up to zero when taken as vectors. |
| D. | Forces are different acting in the same direction. |
| Answer» D. Forces are different acting in the same direction. | |
| 778. |
What does a barometer measure? |
| A. | Liquid pressure |
| B. | Thrust |
| C. | Atmospheric pressure |
| D. | Air temperature |
| Answer» D. Air temperature | |
| 779. |
A deep sea diver's ears get hurt when he is inside the water. What is the cause for it? |
| A. | Lack of oxygen |
| B. | Decrease in atmospheric pressure |
| C. | Increase in water pressure |
| D. | All of the above |
| Answer» D. All of the above | |
| 780. |
A sharp knife enable us to cut through things more easily as compare to the blunt knife because |
| A. | The pressure exerted is lesser when the same force is used |
| B. | The pressure exerted is greater when the same force is used |
| C. | The sharp edge can pass through the material slowly |
| D. | The sharp edge is not felt when cutting through the material. |
| Answer» C. The sharp edge can pass through the material slowly | |
| 781. |
In cities, water from an overhead tank is supplied to houses using the principle of (i) difference in pressure. (ii) gravitational force. (iii) decrease of friction m pipes. |
| A. | Only (i) |
| B. | Only (i) and (ii) |
| C. | Only (ii) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» C. Only (ii) and (iii) | |
| 782. |
A boy set up an experiment as shown in the diagram. As he slide the magnet across the wooden board, the ball bearing followed the magnet's movement and direction. What does the experiment show? (i) Magnetic force can be seen due to friction between ball bearing and wooden board. (ii) Friction and gravity help to move the ball bearing. (iii) The ball bearing is made of a magnetic substance. (iv) Magnetic force can pass through the wooden board. |
| A. | (i) and (ii) |
| B. | (iii) and (iv) |
| C. | (i), (iii) and (iv) |
| D. | (ii), (iii) and (iv) |
| Answer» C. (i), (iii) and (iv) | |
| 783. |
Which of the following effects is NOT caused by the magnetic force between a magnet and a magnetic substance? |
| A. | Change of state |
| B. | Change of shape |
| C. | Change of size |
| D. | Change of chemical composition |
| Answer» E. | |
| 784. |
Does a falling body accelerate? Why? |
| A. | Yes, because the gravity is a force that causes it to move faster. |
| B. | No, because the gravity is a force that causes it to move at constant speed. |
| C. | Yes, because the air causes it to accelerate. |
| D. | No, because air keeps it moving at constant speed. |
| Answer» B. No, because the gravity is a force that causes it to move at constant speed. | |
| 785. |
We use a straw (narrow pipe) to drink juice from a glass. What make this possible? |
| A. | The volume of liquid |
| B. | The atmospheric pressure |
| C. | The gravitational pull |
| D. | All of the above |
| Answer» C. The gravitational pull | |
| 786. |
Jay and Puneet go to the amusement park to play the pin ball game. The figure shows the extent to which each of them pulls the striker. Which one of the following statements is correct? |
| A. | Jay's ball will move faster because spring of his striker is more elastic. |
| B. | Puneet's ball will move faster because the spring of his striker is more elastic. |
| C. | Jay's ball will move faster because the spring of his striker stores more potential energy. |
| D. | Puneet's ball will move faster because the spring of his striker stores more potential energy. |
| Answer» E. | |
| 787. |
In which of the following cases the net force is NOT equal to zero? |
| A. | A kite held stationary in the sky. |
| B. | A ball falling freely from a height. |
| C. | A helicopter hovering above the ground. |
| D. | A cork floating on the surface of water. |
| Answer» C. A helicopter hovering above the ground. | |
| 788. |
In the given diagram, when a weight of 100 g is hung from the spring, its length is 9 cm. When a weight of 150 g is hung from it, its length is 11 cm. What is the length of the spring when there is no weight hanging from it? |
| A. | 2 cm |
| B. | 4 cm |
| C. | 5 cm |
| D. | 7 cm |
| Answer» D. 7 cm | |
| 789. |
A When does a body float on water? |
| A. | When no force is acting on it. |
| B. | When the net force acting on the body is zero |
| C. | When there is a gravitational pull. |
| D. | When there is friction between the body and the water |
| Answer» C. When there is a gravitational pull. | |
| 790. |
A wooden block is floating in water contained in a beaker. If the beaker is placed in a free falling elevator, during the free fall, the up thrust on the block will be |
| A. | Equal to the weight of the block |
| B. | Slightly more than the weight of the block |
| C. | Slightly less than the weight of the block |
| D. | Zero. |
| Answer» E. | |
| 791. |
In the given figure, a beaker is filled with water. A, B and C are three holes in beaker, which of the following statements is correct regarding this? |
| A. | The water comes out with maximum pressure from hole A. |
| B. | The pressure of water comes out from hole B is greater than the pressure of water comes out from hole C and hole A. |
| C. | The water falls out the farthest through the hole C. |
| D. | The water falls out the nearest through the hole B. |
| Answer» D. The water falls out the nearest through the hole B. | |
| 792. |
What is thrust equal to? |
| A. | Force\[\times \]area |
| B. | Force/area |
| C. | Pressure |
| D. | Pressure\[\times \]area |
| Answer» E. | |
| 793. |
Which of the following actions describe pushing force? |
| A. | Kicking |
| B. | Lifting |
| C. | Picking |
| D. | Opening |
| Answer» B. Lifting | |
| 794. |
When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to |
| A. | pressure of water. |
| B. | gravity of the earth. |
| C. | shape of rubber bulb |
| D. | atmospheric pressure |
| Answer» E. | |
| 795. |
Blake is pulling a heavy box placed on a rough surface, as shown in the given figure.Blake is pulling the box by applying a force against |
| A. | load |
| B. | friction |
| C. | tension in rope |
| D. | gravity of Earth |
| Answer» C. tension in rope | |
| 796. |
The given figure shows a book lying on a table. The book lies as it is because of gravitational force acting upon it. The direction of the gravitational force acting upon the book is |
| A. | upward |
| B. | leftward |
| C. | downward |
| D. | rightward |
| Answer» D. rightward | |
| 797. |
Maria is amazed to see that her dry hair gets attracted towards the plastic comb during the combing. The hairs are attracted toward the comb because of |
| A. | gravitational force |
| B. | electrostatic force |
| C. | muscular force |
| D. | friction force |
| Answer» C. muscular force | |
| 798. |
When a stone is thrown in the air, it climbs to a certain height and then drops freely to the ground as shown in the given figure.The stone falls down because of |
| A. | magnetism of Earth |
| B. | gravity of Earth |
| C. | frictional force |
| D. | air pressure |
| Answer» C. frictional force | |
| 799. |
Four situations I. A boy throws a ball up in the air and it falls freely on the ground. II. A horse pulls a cart and the cart moves forward. III. A can is opened with the help of an opener. IV. A magnet is demagnetized by hammering it. In which of the given situations is indirect application of force involved? |
| A. | I |
| B. | II |
| C. | III |
| D. | IV |
| Answer» B. II | |
| 800. |
A man weighing 50 kgf is standing on a wooden plank of \[1m\text{ }\times \text{ }0.5m\]. What will be the pressure exerted by it on the ground? |
| A. | \[300\text{ }kgf/{{m}^{2}}~\] |
| B. | \[100\text{ }kgf/{{m}^{2}}\] |
| C. | \[200\text{ }kgf/{{m}^{2}}\] |
| D. | \[400\text{ }kgf/{{m}^{2}}\] |
| Answer» C. \[200\text{ }kgf/{{m}^{2}}\] | |