NAT II Physical Science Physics With Answers

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NAT II Physical Science Physics

Sr. # Questions Answers Choice
1 The temperature at which the speed of sound becomes double as was at 27°C is 273<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°</b>C 0<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°</b>C 927<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°</b>C 1027<b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">°</b>C
2 Two sources of sound are said to be coherent if They produce sounds of equal intensity They produce sounds of equal frequency They produce sound waves vibrating with the same phase They produce sound waves with zero or constant phase different all instant of time
3 When sound waves travel from air to water which of these remains constant? Velocity Frequency Wavelength All the above
4 In a simple harmonic motion the kinetic energy (KE) and the potential energy (PE), are such that throughout the motion KE remains constant PE remains constant KE/PE is constant KE+PE remains constant
5 A pendulum clock set to give correct time in Karachi is taken to Quetta. It would give correct time if The mass of the pendulum is increased The mass of the pendulum is decreased The length of the pendulum is increased The length of the pendulum is decreased
6 In a simple harmonic motion (SHM), which of the following does not hold? To force on the particle is maximum at the ends The acceleration in minimum at the mean position The potential energy is maximum at the mean position The kinetic energy is maximum at the mean position
7 To make the frequency double of an oscillator, we have to Double the mass Half the mass Quadruple the mass Reduce the mass to one fourth
8 The time period of a simple pendulum is 2 seconds. If its length is increased by 4 times, then its period becomes 16 s 12 s 8 s 4 s
9 If the period of oscillation of mass (M) suspended from a spring is 2s, then the period of mass 4M will be 1 s 2 s 3 s 4 s
10 If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will Increas Decreases Remain the same First A then B
11 In Which case does the potential energy decreases? On compressing a spring On stretching a spring One moving a body against gravitational force One the rising of an air bubble in water
12 Which one of the following is a simple harmonic motion? Wave moving through a string fixed at both ends Earth spinning about its own axis Ball bouncing between two rigid vertical walls Particle moving in a circle with uniform speed
13 Blood has a density Equal to water Greater then water Lesser then water None of these
14 The smooth or steady stream-line flow is know as Laminar flow Turbulent flow Both a and b None of the above
15 According to Stoke's law, drag force depends on Initial velocity Final velocity Terminal velocity Instantaneous velocity
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