PHY101 Midterm by Hackerzzz

ASSALAM O ALAIKUM all fellows Phy101 Midterm PAPER, MCQz & subjective

BS (cs) 3rd sem Hackers Group · Mandi Bahauddin Remember us in your prayers · MIDTERM EXAMINATION · Spring 2009 · PHY101- Physics (Session - 2)

Q1. Please choose one 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. D. 57 Hz

Correct answer: D. 57 Hz

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. C. shortens the string
4. D. lengthens the string

Correct answer: A. loosens the string

Q3. A force of 5000N is applied outwardly to each end of a (1 marks)

Q5. 0-m long rod with a radius of 34.0 cm and a Young's modulus of 125 × 108 N/m2. The elongation of the rod is:

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

Correct answer: 0.55mm

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

Correct answer: In equilibrium at the center of its path because the acceleration is zero there

Q5. In simple harmonic motion, the restoring force must be proportional to the: (1 marks)

1. Amplitude