PHY101 Final Term Solved Papers Mega File

PHY101 FINAL TERM SOLVED PAPERS MEGA FILE

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Q1. The lowest tone produced by a certain organ comes from a 3.0-m pipe with both ends open. If the speed of sound is 340m/s, the frequency of this tone is approximately: (1 marks)

1. A. 7Hz
2. B. 14 Hz
3. C. 28 Hz
4. 57 Hz page no 53

Q2. 1 . To raise the pitch of a certain piano string, the piano tuner : (1 marks)

1. A. loosens the string
2. B. tightens the string
3. shortens the string page no 54
4. D. lengthens the string

Q3. A force of 5000N is applied outwardly to each end of a 5.0-m long rod with a radius of (1 marks)

Q34. 0 cm and a Young's modulus of 125 × 108N/m2. The elongation of the rod is:

1. 0.0020 mm
2. 0.0040 mm
3. 0.14 mm
4. 0.55 mm

Q4. A particle oscillating in simple harmonic motion is: (1 marks)

1. never in equilibrium because it is in motion
2. never in equilibrium because there is always a force
3. in equilibrium at the ends of its path because its velocity is zero there
4. in equilibrium at the center of its path because the acceleration is zero there

Q5. (1 marks)

1. amplitude
2. frequency

velocity

displacement page no:44 Reference:- Now we have a restoring force that is proportional to the distance away from the equilibrium point

Q6. A 160-N child sits on a light swing and is pulled back and held with a horizontal force of 100 N. (1 marks)

The magnitude of the tension force of each of the two supporting ropes is :

1. 60 N
2. 94 N
3. 120 N
4. 190 N

Q7. An object attached to one end of a spring makes 20 vibrations in 10 s. Its angular frequency is: (1 marks)

1. 12.6 rad/s
2. 1.57 rad/s
3. 2.0 rad/s
4. 6.3 rad/s

Refernce:Page · no 42 · V=20 , t=10 · Ω=2 .pie.v · =2*3.14*20=125.6(1/t)=12.6rad/sec

Q8. For an object in equilibrium the net torque acting on it vanishes only if each torque is calculated about: (1 marks)

1. the center of mass
2. the center of gravity
3. the geometrical center

the same point