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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.
| 801. |
The mass of a brick is 2.5 kg. Its dimensions are \[10\text{ }cm\text{ }\times \text{ }5\text{ }cm\text{ }\times \text{ }2\text{ }cm\]. What will be its pressure exerted by it on the ground if it is resting on? (Take 1 kg wt = 10 N) (i) \[a\text{ }10\text{ }cm\text{ }\times \text{ }5\text{ }cm\text{ }base\] (ii) \[a\text{ }5\text{ }cm\text{ }\times \text{ }2\text{ }cm\text{ }base\] |
| A. | 5000 Pa, 25,000 Pa |
| B. | 6000 Pa, 20,000 Pa |
| C. | 4000 Pa, 15,000 Pa |
| D. | 10000 Pa, 10,000 Pa |
| Answer» B. 6000 Pa, 20,000 Pa | |
| 802. |
A box of mass 10 kg has a base area of \[1\text{ }{{m}^{2}}\]. What is the pressure exerted by it on the ground? (Take 1 kg wt = 10 N) |
| A. | 50 Pa |
| B. | 70 Pa |
| C. | 100 Pa |
| D. | 120 Pa |
| Answer» D. 120 Pa | |
| 803. |
What will be the area of a body which experiences a pressure of 6000 Pa by a force of 120 N? |
| A. | \[\frac{1}{500}{{m}^{2}}\] |
| B. | \[\frac{1}{5000}{{m}^{2}}\] |
| C. | \[\frac{1}{5}{{m}^{2}}\] |
| D. | \[\frac{1}{50}{{m}^{2}}\] |
| Answer» E. | |
| 804. |
A rectangular block of mass 2kg is lying on the ground. What will be the thrust on the surface of the ground due to the block? |
| A. | 16.6 N |
| B. | 18.6 N |
| C. | 19.6 N |
| D. | 20.6 N |
| Answer» D. 20.6 N | |
| 805. |
What force will produce a pressure of 50,000 Pa on an area of \[0.20{{m}^{2}}\]? |
| A. | 10,000 N |
| B. | 5,000 N |
| C. | 1 5,000 N |
| D. | 20,000 N |
| Answer» B. 5,000 N | |
| 806. |
William lifts a load by pulling the rope of a pulley system. This is shown in the given figure. Which force is applied by William to lift the load? |
| A. | magnetic |
| B. | muscular |
| C. | electrostatic |
| D. | gravitational |
| Answer» C. electrostatic | |
| 807. |
What is the magnitude of force required in newton's to produce a pressure of 27500 Pa on an area of \[200\text{ }c{{m}^{2}}\]? |
| A. | 650 N |
| B. | 750 N |
| C. | 550 N |
| D. | 450 N |
| Answer» D. 450 N | |
| 808. |
A force of 16N acts on an area of \[50\text{ }c{{m}^{2}}.\]What is the pressure in pascal? |
| A. | 3200 Pa |
| B. | 4200 Pa |
| C. | 5200 Pa |
| D. | 2200 Pa |
| Answer» B. 4200 Pa | |
| 809. |
Force is defined as |
| A. | a push or pull |
| B. | mass per unit volume |
| C. | the ability to do work |
| D. | the movement of charged particles |
| Answer» B. mass per unit volume | |
| 810. |
Trenton is pulling a bucket full of water, out of a well.To pull the bucket out of the well, Trenton is applying |
| A. | gravitational force |
| B. | magnetic force |
| C. | muscular force |
| D. | electric force |
| Answer» D. electric force | |
| 811. |
Amanda throws a stone vertically upward. The stone falls back on the ground.The stone falls back on the ground as a result of |
| A. | Earth's magnetic field |
| B. | photons present in sunlight |
| C. | electric charges present in air |
| D. | gravitational force exerted by Earth |
| Answer» E. | |
| 812. |
Moon revolves around Earth because of the presence of |
| A. | gravitational force |
| B. | frictional force |
| C. | magnetic force |
| D. | electric force |
| Answer» B. frictional force | |
| 813. |
Which of the following forces is not a non-contact force? |
| A. | Magnetic |
| B. | Muscular |
| C. | Electrostatic |
| D. | Gravitational |
| Answer» C. Electrostatic | |
| 814. |
Bob studies four situations involving various forces. These situations are I A satellite orbiting Earth________ II A magnet attracting paper clips____ iii A man hitting a cricket ball with a bat iv A magnet repelling another magnet The situation in which motion is caused by the direct application of a force is |
| A. | I |
| B. | II |
| C. | III |
| D. | IV |
| Answer» D. IV | |
| 815. |
The force applied on an object will not lead to a change in |
| A. | the shape of the object |
| B. | the mass of the object |
| C. | its direction of motion |
| D. | its position |
| Answer» C. its direction of motion | |
| 816. |
Jack pushes a big cabinet with a force of 50 N. Under his force, the cabinet moves at a uniform speed. Jenny comes to help Jack. She begins to push the cabinet in the same direction with a force of 30 N.After Jennys arrival, speed of the moving cabinet will |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | become zero |
| Answer» B. decrease | |
| 817. |
Sandy, Jackie, Rudy, Ronnie, Cruz, and Harry are pushing a box by applying forces of magnitudes 25 N, 35 N, 45 N, 45 N, 30 N, and 50 N respectively, as shown in the given figure Which row shows the net force acting on the box and its consequent motion? |
| A. | Net force (N) Motion of the box 20 Towards South |
| B. | Net force (N) Motion of the box 15 Towards East |
| C. | Net force (N) Motion of the box 15 Towards West |
| D. | Net force (N) Motion of the box 20 Towards North |
| Answer» B. Net force (N) Motion of the box 15 Towards East | |
| 818. |
The given figure shows three plastic bottles interconnected through two pipes. Water is filled in each bottle to the same height. Bottle I is then closed in such a manner that no air is able to enter it.If a stone is dropped in bottle III, then the water level will increase in |
| A. | bottle III only |
| B. | both bottles I and II |
| C. | both bottles II and III |
| D. | bottles I, II, and III equally |
| Answer» D. bottles I, II, and III equally | |
| 819. |
Romesh is climbing a mountain. While climbing, he continuously takes the reading of atmospheric pressure using a barometer. While climbing, Romesh will most probably observe that the height of the mercury column in the barometer |
| A. | keeps decreasing |
| B. | keeps increasing |
| C. | increases first and then decreases |
| D. | decreases first and then increases |
| Answer» B. keeps increasing | |
| 820. |
The number of air molecules in the atmosphere decreases with an increase in height and vice versa. This causes |
| A. | an increase in atmospheric pressure with an increase in height |
| B. | a decrease in atmospheric pressure with an increase in height |
| C. | an increase in wind speed with an increase in height |
| D. | a decrease in wind speed with an increase in height |
| Answer» C. an increase in wind speed with an increase in height | |
| 821. |
Utpal takes four identical beakers (I, II, III, and IV) and makes a small hole in each of them at the same height from the base. He then fills water in. all the beakers. The water comes out from the holes and falls at distances \[{{d}_{1}},{{d}_{2}},{{d}_{3}}\]and \[{{d}_{4}}\] respectively from the base, where \[{{d}_{1}} |
| A. | \[{{V}_{1}}>{{V}_{2}}>{{V}_{3}}>{{V}_{4}}\] |
| B. | \[{{V}_{3}}>{{V}_{4}}>{{V}_{2}}>{{V}_{1}}\] |
| C. | \[{{V}_{1}}={{V}_{2}}={{V}_{3}}={{V}_{4}}\] |
| D. | \[{{V}_{3}}={{V}_{1}}<{{V}_{2}}={{V}_{4}}\] |
| Answer» C. \[{{V}_{1}}={{V}_{2}}={{V}_{3}}={{V}_{4}}\] | |
| 822. |
A cube of edge 2 cm and mass 10 g is placed on the surface of a table. What is the pressure exerted by the cube on the table? |
| A. | \[0.098\text{ }N/{{m}^{2~}}\] |
| B. | \[0.196\text{ }N/{{m}^{2}}\] |
| C. | \[122.5\text{ }N/{{m}^{2~}}\] |
| D. | \[245\text{ }N/{{m}^{2}}\] |
| Answer» E. | |
| 823. |
In a game of tug-o-war. Mark pulls the rope with a force of 60 N from the right. Sandy and George pull the rope with respective forces of 40 N and 20 N from the left, as shown in the given figure. The net force on the rope is |
| A. | 10 N |
| B. | 2 N |
| C. | 60 N |
| D. | 120 N |
| Answer» B. 2 N | |
| 824. |
The weight of a body is 120 N on the earth. If it is taken to the moon, its weight will be about: |
| A. | 120 N |
| B. | 60 N |
| C. | 20 N |
| D. | 720 N |
| Answer» D. 720 N | |
| 825. |
A body is thrown up with a velocity of 20 m/s. The maximum height attained by it is approximately |
| A. | 80 m |
| B. | 60 m |
| C. | 40 m |
| D. | 20 m |
| Answer» E. | |
| 826. |
Two bodies A and B of mass 500 g and 200 g respectively are dropped near the earths surface. Let the acceleration of A and B be \[{{a}_{A}}\] and \[{{a}_{B}}\]respectively, then |
| A. | \[{{a}_{A}}={{a}_{B}}\] |
| B. | \[{{a}_{A}}>{{a}_{B}}\] |
| C. | \[{{a}_{A}}<{{a}_{B}}\] |
| D. | \[{{a}_{A}}\ne {{a}_{B}}\] |
| Answer» B. \[{{a}_{A}}>{{a}_{B}}\] | |
| 827. |
The value of g at pole is |
| A. | greater than the value at the equator |
| B. | less than the value at the equator |
| C. | equal to the value of the equator |
| D. | none of these |
| Answer» B. less than the value at the equator | |
| 828. |
A stone is dropped from the roof of a building takes 4s to reach ground. The height of the building is |
| A. | 19.6 m |
| B. | 39.2 m |
| C. | 156.8 m |
| D. | 78.4 m |
| Answer» E. | |
| 829. |
Jack is trying to climb a height with the help of a rope, as shown in the given figure.Jack can climb the top by overcoming the |
| A. | tension of the rope |
| B. | friction of the rope |
| C. | magnetic force of Earth |
| D. | gravitational force of Earth |
| Answer» E. | |
| 830. |
A wooden block slides down a rough inclined ramp, as shown in the given figure.The wooden block experiences |
| A. | only frictional force |
| B. | only magnetic force |
| C. | gravitational and magnetic forces |
| D. | frictional and gravitational forces |
| Answer» E. | |
| 831. |
Gravitational force is ____i____force, while ___ii___ force is repulsive as well as attractive. The given statement is correctly completed by row |
| A. | i-an attractive; ii-frictional |
| B. | i-a repulsive, ii-magnetic |
| C. | i- an attractive; ii-Magnetic |
| D. | i-a repulsive; ii- frictional |
| Answer» D. i-a repulsive; ii- frictional | |
| 832. |
Earth revolves around Sun in 365 days. Earth and Sun are not in contact with each other. Earths revolution around Sun is caused by the |
| A. | shape of Sun |
| B. | shape of Earth |
| C. | force between Earth and Sun |
| D. | distance between Earth and Sun |
| Answer» D. distance between Earth and Sun | |
| 833. |
The given figure shows a heavy box being pushed and pulled-The number of persons pulling the box is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 834. |
Joanna is playing carrom along with her friends. She strikes the striker with her index finger and pockets the queen. Joanna uses which force for pocketing the queen? |
| A. | Electric |
| B. | Magnetic |
| C. | Muscular |
| D. | Gravitational |
| Answer» D. Gravitational | |
| 835. |
When a wooden box is suspended by a spring balance, the spring stretches because |
| A. | Earths gravity pulls the box |
| B. | Earths magnetic field attracts the spring |
| C. | of the frictional force between the box and the spring |
| D. | of the electrostatic force between the box and the spring |
| Answer» B. Earths magnetic field attracts the spring | |
| 836. |
A ball rolls at constant speed in a straight line along the ground. Jerry kicks the ball in the direction of its motion-As a result of Jerrys kick, speed of the ball will |
| A. | increase |
| B. | decrease |
| C. | remain same |
| D. | become zero |
| Answer» B. decrease | |
| 837. |
Eric and Evan are pulling a big load in opposite directions. Eric is applying a force of 20.56 N, while Evan is applying a force of 25.7 N on the load. |
| A. | 4.15 N toward Evan |
| B. | 5.14 N toward Evan |
| C. | 4.15 N toward Eric |
| D. | 5.14 N toward Eric |
| Answer» C. 4.15 N toward Eric | |
| 838. |
Four boys, Hunter, Jackson, Samuel, and Sean are pushing a heavy box. Their respective forces are listed below. Boy Force (N) Hunter 25 Jackson 25 Samuel 30 Sean 35 As a result of the presence of sand on the ground, the frictional force between the box and the ground is 15 N. The total force experienced by the box is |
| A. | 100 N toward the left |
| B. | 115N toward the left |
| C. | 100 N toward the right |
| D. | 115 N toward the right |
| Answer» B. 115N toward the left | |
| 839. |
If \[20c{{m}^{3}}\] gas at latm is expanded to \[50c{{m}^{3}}\] at constant T, then what is the fmal pressure? |
| A. | \[20\times \frac{1}{50}atm\] |
| B. | \[50\times \frac{1}{20}atm\] |
| C. | \[\frac{1}{20\times 50}atm\] |
| D. | None of these |
| Answer» B. \[50\times \frac{1}{20}atm\] | |
| 840. |
A bus is moving along a curved path, as shown in the given figure. During the motion of the bus, the direction of force on it: |
| A. | remains the same |
| B. | changes continuously |
| C. | is directed in the backward direction |
| D. | is directed in the downward direction |
| Answer» C. is directed in the backward direction | |
| 841. |
The column of mercury in a barometer is 76 cm Hg. Calculate the atmospheric pressure if the density of mercury \[=13600\text{ }kg{{m}^{-3}}\]. (Take\[g\text{ }=\text{ }10\text{ }m{{s}^{-(}}B\]). |
| A. | \[1.03\text{ }\times \text{ }{{10}^{5\text{ }}}Pa\] |
| B. | \[1.03\,\times \text{ 1}{{0}^{3}}\text{ }Pa\] |
| C. | \[1.03\text{ }\times \text{ 1}{{0}^{4}}\text{ }Pa\] |
| D. | \[1.03\text{ }\times \text{ }{{10}^{6}}\text{ }Pa\] |
| Answer» B. \[1.03\,\times \text{ 1}{{0}^{3}}\text{ }Pa\] | |
| 842. |
Atmospheric pressure is measured by : |
| A. | Thermometer |
| B. | Calorimeter |
| C. | Hydrometer |
| D. | Barometer |
| Answer» E. | |
| 843. |
1 atm = __________ m Hg. |
| A. | 0.76 |
| B. | 76 |
| C. | 760 |
| D. | 7.6 |
| Answer» B. 76 | |
| 844. |
The liquid used in Barometer is: |
| A. | Mercury |
| B. | Kerosene |
| C. | Water |
| D. | Alcohol |
| Answer» B. Kerosene | |
| 845. |
The value of atmospheric pressure on the surface of earth at sea level is nearly Take density of mercury\[=\text{ }13600\text{ }kg/{{m}^{3}}\]; density of water \[=\text{ }1000\text{ }kg/{{m}^{3}}\] |
| A. | \[{{10}^{5}}\text{ }Pa\] |
| B. | \[{{10}^{3}}\text{ }Pa\] |
| C. | \[{{10}^{1}}\text{ }Pa\] |
| D. | \[{{10}^{4}}\text{ }Pa\] |
| Answer» B. \[{{10}^{3}}\text{ }Pa\] | |
| 846. |
Four actions: I When pressed, the water present in a rubbe dropper rises. II A nail is pushed into a wall. III A postcard remains attached to an inverts glass of water. IV When pressed, a rubber sucker gets attached to a wall. Which of the following actions is not caused by atmospheric pressure? |
| A. | I |
| B. | II |
| C. | III |
| D. | IV |
| Answer» C. III | |
| 847. |
Vishnu has two plastic bottles of different shapes. The two bottles are connected through a pipe, as shown in the given figure. Initially, both the bottles have water up to an equal level. One of the bottles has a tap. Vishnu opens the tap for some time such that the water level in bottle II decreases by one centimetre. The initial water level in each bottle is seven centimetres. What is the new water level in bottle I? |
| A. | 5.5 cm |
| B. | 6.0 cm |
| C. | 6.5 cm |
| D. | 7.0 cm |
| Answer» C. 6.5 cm | |
| 848. |
Roger noticed a book lying on a table. In order to move the book, he must apply a |
| A. | gear |
| B. | load |
| C. | force |
| D. | speed |
| Answer» D. speed | |
| 849. |
The mass of body is measured to be 12 kg on the earth. Its mass on moon will be |
| A. | 12 kg |
| B. | 6 kg |
| C. | 2 kg. |
| D. | 72 kg |
| Answer» B. 6 kg | |
| 850. |
The weight of an object is |
| A. | the quantity of matter it contains |
| B. | refers to its inertia |
| C. | same as its mass but is expressed in different units |
| D. | the force with which it is attracted towards the earth |
| Answer» E. | |