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McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
1. |
Only force acting on a bouncing ball is |
A. | gravity |
B. | weight of ball |
C. | friction |
D. | a and b both |
Answer» D. a and b both |
2. |
Accelerometer detects the |
A. | small acceleration |
B. | large acceleration |
C. | small deceleration |
D. | large acceleration and deceleration |
Answer» D. large acceleration and deceleration |
3. |
If the gradient of a graph is negative, then the acceleration is |
A. | positive |
B. | negative |
C. | zero |
D. | 1 |
Answer» B. negative |
4. |
If a student drops a stone from a cliff of height 30 m and the time it takes to reach the ground is 2.6 s, then the acceleration due to gravity is |
A. | $$$9ms^{-2}$$$ |
B. | $$$10ms^{-2}$$$ |
C. | $$$4ms^{-2}$$$ |
D. | $$$8.8ms^{-2}$$$ |
Answer» D. $$$8.8ms^{-2}$$$ |
5. |
Gradient of line of velocity-time graph is tells us the |
A. | velocity |
B. | acceleration |
C. | distance |
D. | time |
Answer» B. acceleration |
6. |
A stone is thrown upwards with initial velocity of $$$20ms^{-1}$$$, the height that stone will reach would be |
A. | 20 m |
B. | 30 m |
C. | 40 m |
D. | 50 m |
Answer» A. 20 m |
7. |
Projectile will attain its maximum range, if it is fired at an angle of |
A. | 30° |
B. | 47° |
C. | 90° |
D. | 45° |
Answer» D. 45° |
8. |
Horizontal component of a bouncing ball is |
A. | affected by gravity |
B. | unaffected by gravity |
C. | affected by weight |
D. | affected by contact force |
Answer» B. unaffected by gravity |
9. |
When ball having a projectile motion is rising up, it |
A. | decelerates |
B. | accelerates |
C. | rises up with constant acceleration |
D. | acceleration becomes zero |
Answer» A. decelerates |
10. |
Equation of motion can be used for |
A. | straight line motion only |
B. | curved motion only |
C. | motion along the circular path |
D. | all types of motion |
Answer» A. straight line motion only |
11. |
Acceleration of free fall depends on the |
A. | surface |
B. | weight of object |
C. | distance from center of Earth |
D. | size of object |
Answer» B. weight of object |
12. |
If initial velocity of an object is zero, then distance covered by it in time t and acceleration of $$$9.8ms^{-2}$$$ would be |
A. | $$$2.9\:t^{2}$$$ |
B. | $$$3\:t^{2}$$$ |
C. | $$$4\:t^{2}$$$ |
D. | $$$4.9\:t^{2}$$$ |
Answer» D. $$$4.9\:t^{2}$$$ |
13. |
As the ball falls towards the ground, its velocity |
A. | increases |
B. | decreases |
C. | remains constant |
D. | becomes zero |
Answer» A. increases |
14. |
Gradient of velocity-time graph tells us about object's |
A. | velocity |
B. | displacement |
C. | distance |
D. | acceleration |
Answer» D. acceleration |
15. |
An object whose velocity is changing is said to be in a state of |
A. | acceleration |
B. | rest |
C. | equilibrium |
D. | Brownian motion |
Answer» A. acceleration |
16. |
Acceleration of train when it is moving steadily from $$$4.0\:ms^{-1}$$$ to $$$20\:ms^{-1}$$$ in 100s is |
A. | $$$1\:ms^{-2}$$$ |
B. | $$$2\:ms^{-2}$$$ |
C. | $$$0.16\:ms^{-2}$$$ |
D. | $$$3\:ms^{-2}$$$ |
Answer» C. $$$0.16\:ms^{-2}$$$ |
17. |
If we get a straight line with positive slope then its acceleration is |
A. | increasing |
B. | decreasing |
C. | zero |
D. | constant |
Answer» D. constant |
18. |
If a spinster staring from rest has acceleration of $$$5ms^{-2}$$$ during 1st 2.0s of race then her velocity after 2 s is |
A. | $$$20ms^{-1}$$$ |
B. | $$$10ms^{-1}$$$ |
C. | $$$15ms^{-1}$$$ |
D. | $$$5ms^{-1}$$$ |
Answer» B. $$$10ms^{-1}$$$ |
19. |
Horizontal distance traveled by a ball if it's thrown with initial velocity of $$$20ms^{-1}$$$ at an angle of 30° is |
A. | 24 m |
B. | 56 m |
C. | 35.3 m |
D. | 36.3 m |
Answer» C. 35.3 m |
20. |
If a car starting from rest reaches a velocity of $$$18ms^{-1}$$$ after 6.0 s then its acceleration is |
A. | $$$1ms^{-2}$$$ |
B. | $$$2ms^{-2}$$$ |
C. | $$$3ms^{-2}$$$ |
D. | $$$4ms^{-2}$$$ |
Answer» C. $$$3ms^{-2}$$$ |
21. |
A train travelling at $$$20m s^{-1}$$$ accelerates at $$$ 0.5ms^{-2}$$$ for 30 s, the distance travelled by train is |
A. | 825 m |
B. | 700 m |
C. | 650 m |
D. | 600 m |
Answer» A. 825 m |
22. |
Area under velocity-time graph tells us the |
A. | time |
B. | acceleration |
C. | displacement |
D. | velocity |
Answer» C. displacement |
23. |
If a secondary coil has 40 turns, and, a primary coil with 20 turns is charged with 50 V of potential difference, then the potential difference in the secondary coil would be |
A. | 50 V in secondary coil |
B. | 25 V in secondary coil |
C. | 60 V in secondary coil |
D. | 100 V in secondary coil |
Answer» D. 100 V in secondary coil |
24. |
Generators at a power station produce electric power at voltage |
A. | 45 kW |
B. | 50 kW |
C. | 60 kW |
D. | 25 kW |
Answer» D. 25 kW |
25. |
Equation which measures alternating voltage is |
A. | Vsin ω |
B. | sin t |
C. | Vo sinωt |
D. | V=IR |
Answer» C. Vo sinωt |
26. |
In transformer, alternating current is induced in |
A. | primary coil |
B. | secondary coil |
C. | iron core |
D. | resistor |
Answer» B. secondary coil |
27. |
High voltages lead to |
A. | less power loss |
B. | more power loss |
C. | high current |
D. | high resistance |
Answer» A. less power loss |
28. |
Graph of alternating current is a |
A. | cos wave |
B. | tan wave |
C. | curve |
D. | sine wave |
Answer» D. sine wave |
29. |
A component that allows only unidirectional current to pass through it is |
A. | resistor |
B. | inductor |
C. | transformer |
D. | diode |
Answer» D. diode |
30. |
Average power dissipated in resistor if sinusoidal p.d of peak value 25V is connected across a 20 Ω resistor is |
A. | 15.6 W |
B. | 15 W |
C. | 16 W |
D. | 17 W |
Answer» A. 15.6 W |
31. |
Amount of d.c voltage as compare to Vo is |
A. | 50% |
B. | 60% |
C. | 70% |
D. | 80% |
Answer» C. 70% |
32. |
A well designed transformer loses power under |
A. | 10% |
B. | 1.20% |
C. | 0.1% |
D. | 20% |
Answer» C. 0.1% |
33. |
Ratio of voltages is equal to ratio of |
A. | iron sheets in core |
B. | coil |
C. | number of turns in coil |
D. | all of above |
Answer» C. number of turns in coil |
34. |
Process in which A.C is converted into D.C is called |
A. | induction |
B. | rectification |
C. | inversion |
D. | dispersion |
Answer» B. rectification |
35. |
Steady d.c voltage is also known as |
A. | square velocity |
B. | root mean square velocity |
C. | root velocity |
D. | velocity |
Answer» B. root mean square velocity |
36. |
Ratio of voltages is inverse ratio of the |
A. | transformer |
B. | resistor |
C. | iron core |
D. | current |
Answer» D. current |
37. |
If output voltage is greater than input voltage, then transformer is |
A. | step up |
B. | step down |
C. | faulty |
D. | fatal |
Answer» A. step up |
38. |
Highest point on AC graph is known as |
A. | peak value |
B. | amplitude |
C. | frequency |
D. | wave front |
Answer» A. peak value |
39. |
There are three equations of uniformly accelerated motion, the odd one out is |
A. | final_velocity = initial_velocity + (acceleration × time |
B. | distance_moved = (initial_velocity × time) + (0.5 × acceleration × time² |
C. | final_velocity² = initial_velocity² + (2 × acceleration × distance_moved |
D. | final_velocity = initial_velocity + (2 × acceleration × distance_moved |
Answer» D. final_velocity = initial_velocity + (2 × acceleration × distance_moved |
40. |
Kinetic friction is always |
A. | lesser than static friction |
B. | greater than static friction |
C. | equal to static friction |
D. | equal to contact force |
Answer» A. lesser than static friction |
41. |
Gravitational potential is always |
A. | positive |
B. | negative |
C. | zero |
D. | infinity |
Answer» B. negative |
42. |
In order to keep a body moving in a circle, there exists a force on it that is directed toward the center of the circle. This force is known as |
A. | Centrifugal force |
B. | Centripetal force |
C. | Gravitational Force |
D. | magnetic force |
Answer» B. Centripetal force |
43. |
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» D. 200 kN |
44. |
If we have a positive and a negative charge, then force between them is |
A. | positive |
B. | negative |
C. | zero |
D. | infinite |
Answer» B. negative |
45. |
Electrical force exerted by two point charges on each other is inversely proportional to |
A. | sum of their charges |
B. | product of their charges |
C. | distance between them |
D. | square of distance between them |
Answer» D. square of distance between them |
46. |
Unit for pressure used in weather maps is millibar. 1 millibar is equal to |
A. | 1000 bar |
B. | 100 kPa |
C. | 100 Pa |
D. | 1 atm |
Answer» C. 100 Pa |
47. |
Speed of stationary waves is |
A. | $$$1ms^{-1}$$$ |
B. | $$$2ms^{-1}$$$ |
C. | $$$3ms^{-1}$$$ |
D. | zero |
Answer» D. zero |
48. |
If charge is placed at infinity, it's potential is |
A. | zero |
B. | infinite |
C. | 1 |
D. | -1 |
Answer» A. zero |
49. |
Most appropriate instrument for measurement of internal and external diameter of a tube is |
A. | vernier callipers |
B. | micrometer screw gauge |
C. | meter rule |
D. | measuring tape |
Answer» A. vernier callipers |
50. |
When distance from center is doubled then electric field strength will |
A. | decrease by the factor of four |
B. | increase by factor of four |
C. | will be same |
D. | decrease by factor of two |
Answer» A. decrease by the factor of four |
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