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MCQOPTIONS
This section includes 488 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Units of strain are |
| A. | Newton |
| B. | Joules |
| C. | Watt |
| D. | no units |
| Answer» E. | |
| 102. |
Boyle's law states that |
| A. | pressure of a gas is inversely proportional to its volume i.e. P V = constant |
| B. | pressure of a gas is directly proportional to its volume i.e. P V = constant |
| C. | pressure of a gas is inversely proportional to the square of its volume i.e. P V = constant |
| D. | pressure of a gas is directly proportional to the square of its volume i.e. P V = constant |
| Answer» B. pressure of a gas is directly proportional to its volume i.e. P V = constant | |
| 103. |
Kepler's 3rd law states that... |
| A. | the periods of revolution of the planets are proportional to the cube of their mean distances from sun |
| B. | the periods of revolution of the planets are inversely proportional to the cube of their mean distances from sun |
| C. | the squares of the periods of revolution of the planets are proportional to the cube of their mean distance from sun |
| D. | the squares of the periods of revolution of the planets are inversely proportional to the cube of their mean distance from sun |
| Answer» D. the squares of the periods of revolution of the planets are inversely proportional to the cube of their mean distance from sun | |
| 104. |
Bone thickness is equal to {{}} |
| A. | c t/2 |
| B. | c t |
| C. | c/t |
| D. | t/2 |
| Answer» B. c t | |
| 105. |
Velocity at equilibrium position is |
| A. | constant |
| B. | minimum |
| C. | maximum |
| D. | zero |
| Answer» D. zero | |
| 106. |
Height of atmosphere, if atmospheric density is 1.29 kg m-3 and atmospheric pressure is 101 kPa, is {{}} |
| A. | 7839.4 m |
| B. | 7829.4 m |
| C. | 7849.4 m |
| D. | 7859.4 m |
| Answer» C. 7849.4 m | |
| 107. |
As depth increases, pressure in a fluid |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | varies |
| Answer» B. decreases | |
| 108. |
Speed of sound in air is {{}} |
| A. | 280 m s-1 |
| B. | 300 m s-1 |
| C. | 350 m s-1 |
| D. | 330 m s-1 |
| Answer» E. | |
| 109. |
If extension in spring is proportional to load applied, then material obeys |
| A. | Newton's law |
| B. | gravitational law |
| C. | Charles's law |
| D. | Hooke's law |
| Answer» E. | |
| 110. |
Pressure in fluid depends upon |
| A. | depth below the surface |
| B. | density of fluid |
| C. | the value of g |
| D. | all of above |
| Answer» E. | |
| 111. |
If a force of 50 N is applied across the cross-sectional area of 5 10 - 7m2 then stress applied on it is {{}} |
| A. | 1 10 8 Pa |
| B. | 20 Pa |
| C. | 50 Pa |
| D. | 100 Pa |
| Answer» B. 20 Pa | |
| 112. |
Direction of conventional current is |
| A. | direction of neutron flow |
| B. | direction of electron flow |
| C. | direction of flow of positive charge |
| D. | same as that of electric current |
| Answer» D. same as that of electric current | |
| 113. |
Mass of steel sphere having density 7850 kg m-3 and radius 0.15 m is |
| A. | 112 kg |
| B. | 290 kg |
| C. | 110.9 kg |
| D. | 300 kg |
| Answer» D. 300 kg | |
| 114. |
In a force-extension graph, force is taken along horizontal axis because |
| A. | force is independent variable |
| B. | extension is independent variable |
| C. | force is dependent variable |
| D. | all of above |
| Answer» B. extension is independent variable | |
| 115. |
Extension and applied force are |
| A. | directly proportional |
| B. | inversely proportional |
| C. | are independent of each other |
| D. | inversely related |
| Answer» B. inversely proportional | |
| 116. |
Spring constant of spring is also called |
| A. | gradient |
| B. | tensile forces |
| C. | stiffness |
| D. | compression |
| Answer» D. compression | |
| 117. |
Tensile strain is equal to |
| A. | Force per unit area |
| B. | Force per unit volume |
| C. | Extension per unit length |
| D. | Force per unit length |
| Answer» D. Force per unit length | |
| 118. |
Maximum displacement from equilibrium position is |
| A. | frequency |
| B. | amplitude |
| C. | wavelength |
| D. | period |
| Answer» C. wavelength | |
| 119. |
Speed of sound in water is 1500 m s -1, depth of water when reflected sound waves are detected after 0.40 s is {{}} |
| A. | 700 m |
| B. | 600 km |
| C. | 600 m |
| D. | 750 km |
| Answer» D. 750 km | |
| 120. |
Pressure of gas depends on the |
| A. | density of gas |
| B. | mean square speed of gas molecules |
| C. | both A and B |
| D. | temperature |
| Answer» D. temperature | |
| 121. |
If a snail crawls 12 cm in 60 s then it's average speed in mm s -1 is {{}} |
| A. | 2 mm s -1 |
| B. | 5 mm s -1 |
| C. | 10 mm s -1 |
| D. | 20 mm s -1 |
| Answer» B. 5 mm s -1 | |
| 122. |
If distance is increasing uniformly with time, then velocity is |
| A. | increasing |
| B. | decreasing |
| C. | constant |
| D. | zero |
| Answer» D. zero | |
| 123. |
If the slope of a graph is zero and so the displacement, then velocity is |
| A. | increasing |
| B. | decreasing |
| C. | constant |
| D. | zero |
| Answer» E. | |
| 124. |
{{}} If a river flows from west to east with constant velocity of 1.0 m s -1 and a boat leaves south bank heading towards north with velocity of 2.40 m s -1 , then resultant velocity of boat is |
| A. | 2.6 m s-1 |
| B. | 2.7 m s-1 |
| C. | 2.8 m s-1 |
| D. | 2.9 m s-1 |
| Answer» B. 2.7 m s-1 | |
| 125. |
Speed of snail as compared to speed of a car will be in units {{}} |
| A. | cm s-1 |
| B. | m s-1 |
| C. | km s-1 |
| D. | km h-1 |
| Answer» B. m s-1 | |
| 126. |
Distance travelled by a body in time t is |
| A. | instantaneous speed |
| B. | average velocity |
| C. | average acceleration |
| D. | instantaneous acceleration |
| Answer» C. average acceleration | |
| 127. |
A car is travelling at 15 m s-1, the distance it will travel in 1 hour is {{}} |
| A. | 54 km |
| B. | 55 km |
| C. | 56 km |
| D. | 57 km |
| Answer» B. 55 km | |
| 128. |
Sum of e.m.f around any loop equals |
| A. | sum of current |
| B. | sum of potential difference |
| C. | sum of resistances |
| D. | sum of charges passing through it per second |
| Answer» C. sum of resistances | |
| 129. |
Current entering and leaving a point in a circuit should be |
| A. | equal |
| B. | decreasing |
| C. | increasing |
| D. | variable |
| Answer» B. decreasing | |
| 130. |
Current through each resistor when they are connected in series is |
| A. | different |
| B. | same |
| C. | can be both A and B |
| D. | decreasing |
| Answer» C. can be both A and B | |
| 131. |
If a billion electrons enter a point in 1 s, then number of electrons leaving that point in 1 s are |
| A. | 2 billion |
| B. | 3 billion |
| C. | 1 billion |
| D. | 10 billion |
| Answer» D. 10 billion | |
| 132. |
Three resistances 20 , 30 and 60 are connected in parallel, their combined resistance is given by |
| A. | 110 |
| B. | 50 |
| C. | 20 |
| D. | 10 |
| Answer» E. | |
| 133. |
Force which makes it difficult to run through shallow water is called |
| A. | viscosity |
| B. | up thrust |
| C. | friction |
| D. | drag |
| Answer» E. | |
| 134. |
Thickness of material which decreases intensity of x-ray material to half of original value is |
| A. | quarter thickness |
| B. | half thickness |
| C. | half life |
| D. | 2 times of thickness |
| Answer» C. half life | |
| 135. |
A rectangle-shaped open-to-sky tank of water has a length of 2 m and a width of 1 m. If the atmospheric pressure is assumed to be 100 kPa and thickness of the tank walls is assumed to be negligible, the force exerted by the atmosphere on the surface of water is |
| A. | 20 kN |
| B. | 50 kN |
| C. | 100 kN |
| D. | 200 kN |
| Answer» E. | |
| 136. |
A weight-lifter raises weights with a mass of 200 kg from the ground to a height of 1.5 m, the increase in their G.P.E is |
| A. | 1962 J |
| B. | 2940 J |
| C. | 800 J |
| D. | 1000 J |
| Answer» C. 800 J | |
| 137. |
Increase in kinetic energy of car having mass 800 kg and velocities ranging from 20 m s -1 to 30 m s -1 is {{}} |
| A. | 300 KJ |
| B. | 500 KJ |
| C. | 400 KJ |
| D. | 200 KJ |
| Answer» E. | |
| 138. |
Change in length and cross-sectional area of metal wire changes |
| A. | current |
| B. | voltage |
| C. | resistance |
| D. | magnetic effect |
| Answer» D. magnetic effect | |
| 139. |
Angular velocity of second hand of clock is 0.105 rad s-1 and length of hand is 1.8 cm, then speed of tip of hand is {{}} |
| A. | 0.189 cm s-1 |
| B. | 1 cm s-1 |
| C. | 0.189 m s-1 |
| D. | 2 m s-1 |
| Answer» B. 1 cm s-1 | |
| 140. |
Process in which A.C is converted into D.C is called |
| A. | induction |
| B. | rectification |
| C. | inversion |
| D. | dispersion |
| Answer» C. inversion | |
| 141. |
While Young's modulus E relates to change in length and bulk modulus K relates to change in volume, modulus of rigidity G relates to change in: |
| A. | weight |
| B. | density |
| C. | shape |
| D. | temperature |
| Answer» D. temperature | |
| 142. |
In s.h.m, acceleration is always directed towards the |
| A. | equilibrium position |
| B. | mean position |
| C. | tangent to the motion |
| D. | downwards |
| Answer» B. mean position | |
| 143. |
Contact force always acts at |
| A. | acute angles to the surface producing it |
| B. | right angles to the surface producing it |
| C. | obtuse angle to the surface producing it |
| D. | parallel to the surface producing it |
| Answer» C. obtuse angle to the surface producing it | |
| 144. |
Amplitude of modulated wave is in phase with |
| A. | output |
| B. | system |
| C. | frequency |
| D. | signal |
| Answer» E. | |
| 145. |
To limit current in LED, resistor should be connected in |
| A. | parallel |
| B. | series |
| C. | evacuated flask |
| D. | ionized tube |
| Answer» C. evacuated flask | |
| 146. |
The closer satellite is to Earth, its speed should be |
| A. | more fast |
| B. | more slow |
| C. | zero |
| D. | any constant value |
| Answer» B. more slow | |
| 147. |
Variation in amplitude or frequency of carrier wave is called |
| A. | amplitude modulation |
| B. | frequency modulation |
| C. | modulation |
| D. | bandwidth |
| Answer» D. bandwidth | |
| 148. |
Internal resistance of cell when there is current of 0.40 A when a battery of 6.0 V is connected to a resistor of 13.5 is |
| A. | 1.5 |
| B. | 2.3 |
| C. | 3.5 |
| D. | 4.5 |
| Answer» B. 2.3 | |
| 149. |
In frequency modulation, amplitude of modulated wave is |
| A. | positive |
| B. | negative |
| C. | constant |
| D. | zero |
| Answer» D. zero | |
| 150. |
{{}} A white ball of mass 1.0 kg moving with initial speed u = 0.5 m s -1 collides with stationary red ball of same mass, they move forward making angle of 90 between their paths. Their speed is |
| A. | 1 m s -1 |
| B. | 0.354 m s -1 |
| C. | 2 m s -1 |
| D. | 3 m s -1 |
| Answer» C. 2 m s -1 | |