MDCAT Physics MCQ's Test With Answers

MDCAT Physics MCQ's Test

Sr. # Questions Answers Choice
1 A ball takes ‘t’ second to fall from a height 𝒉𝟏 and ‘2t’ second to fall from a height 𝒉𝟐 then h1/h2 is: 2 4 0.5 0.25
2 In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The vertical component of acceleration of stone is: Zero at T Greatest at T ) Greatest at P the same at P as at T
3
Two projectiles ‘A’ and ‘B’ are thrown with same speed but at angle of 40 degree and 50 degree with the horizontal. The horizontal range of ‘A’ will be:
 Equal to that of ‘B’ Greater than that of ‘B’ Less than that of ‘B’ 4/5times that of ‘B’
4
A machine gun fires ‘n’ bullets per second and the mass of each bullet is m. If v is the speed of each bullet then the force exerted on the machine gun is:
 <i>mng</i> <i>mnv</i> <i>mnvg</i> <i>mnv/g</i>
5
A particle executing one dimensional motion, finally comes to rest, what will be the angle between acceleration and displacement during motion:
 0 <i>π</i> <div>𝜋/2</div> <div>𝜋/4</div>
6
A particle executing one dimensional motion, finally comes to rest, what will be the angle between
acceleration and displacement during motion:
 0 π <div>𝜋/2</div> 𝜋/4
7 The distance covered by a body in time ‘t’ starting from rest is: 1/2 𝑡<sup>2</sup> <i>vt</i> 𝑎𝑡<sup>2</sup> 𝑎𝑡<sub>2</sub>
8 Most motorbikes have ____________ cylinder/s engine but cars usually have _________ cylinders on the same crankshaft. Four , Six One , four two , five None of these
9 No of spark plugs needed in diesel engine is: Four Five Six None of these
10 A certain engine coverts 20% of available heat energy into work. Then its efficiency will be: 20% 80% 50% None of these
11 Diesel engine coverts ____________ of available heat energy into work. 20% to 25% 25% to 30% 30% to 35% 35% to 40%
12 Petrol engine coverts ____________ of available heat energy into work. 20% to 25% 25% to 30% 30% to 35% 35% to 40%
13 One degree of thermodynamics scale of temperature is called: Celsius Fahrenheit Kelvin Radian
14 The efficiency of a practical heat engine: Can be 100% Can not be 100% Is always Zero None of these
15 Carnot engine is ____________ heat engine. A reversible An irreversible An ideal Both A and C
16 If temperature of the sink is decreased, efficiency of a carnot engine. Remains constant Decreases Increases None of these
17 What will be efficiency of carnot engine when it is operated between the temperatures 47oC and 127 oC: Reversible Irreversible Sometimes A and B None of these
18 The ratio of output work per cycle to input energy per cycle is called: Entropy Internal energy Efficiency None of these
19 As the working substance of a heat engine completes a cycle, there is no change in: Internal energy Pressure Volume All of these
20 The law of thermodynamics which discusses the condition under which heat energy is converted into and equivalent amount of work is: 1st 2nd 3rd None of these
21 Steam engine is: An optical system A thermal system A thermodynamic system None of these
22 If the temperature difference between hot and cold body is greater the heat engine is: Not efficient Less efficient More efficient NOne of above
23 If Cvdonotes molar specific heat at constant volume and𝜟 T is the change in temperature, then Cv𝜟T gives: Volume Pressure Energy Entropy
24 A process in which no heat enters or leaves the system is called. Adiabatic process Isothermal process Isochoric process None of these
25 The equation PVr = Constant applies to: Isothermal process Adiabatic process Isobaric process None of these
26 A process which is carried at constant temperature and Boyle's law can be applied is called: Adiabatic process Isothermal process Isochoric process None of these
27 The equation W = ________𝜟U represents: Thermal process adiabatic process Isobaric process None of these
28 The value of universal gas constant R is: 8.314 J/K mole K 8314 J/ mole K 8.314 J/ mole K None of these
29 While dealing with the processes i thermodynamics, the working substances is usually: Oxygen gas Hydrogen gas Ideal gas None of these
30 The time period of a simple pendulum is 1 second. If g = 9.8 m /sec2, then length of the simple pendulum will be: 380 m 0.25 m 2.5 m None of these
31 A second's pendulum completes 5 vibrations in: 5 seconds 10 seconds 2.5 seconds 15 seconds
32 Which of the following quantities /quantity becomes zero at any moment during oscillation. Speed Acceleration Momentum All of these
33 A small bob is swung from a rope 2.45 m long. Its period of oscillation is: 3.14 seconds 4.72 seconds 6.82 seconds 8.35 seconds
34 The length of second's pendulum at a place where g=980 cm/sec2is: 77 cm 88.1 cm 99.2 cm 100.3 cm
35 Second's pendulum is the pendulum whose time period is: 1 second 2 second 3 second None of these
36 The frequency of second's pendulum is: 0.5 Hz 1.0 Hz 1.5 Hz 2 Hz
37 When a simple pendulum swings, which of the following quantities does not become zero throughout the oscillation? Speed weight Acceleration Momentum
38 Which of the following is responsible for the motion of the bob of the simple pendulum: mg sin𝜽 Tension T mg cos𝜽 mg
39 The tension T in the string of a simple pendulum acts: Velocity down load Along the string Vertically upward None of these
40 The string of simple pendulum should be: Heavy Extensible Inextensible None of these
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