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IGCSE A Level Physics Practice Test 31

# Simple Harmonic Motion Gravitation Quiz PDF: Questions and Answers - 31

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## Simple Harmonic Motion Gravitation Questions and Answers : Quiz 31

MCQ 151:

A force that acts to return the mass to its equilibrium position is called

1. frictional force
2. restoring force
3. normal force
4. contact force
MCQ 152:

Larmor frequency depends upon the

1. individual nucleus
2. magnetic flux density
3. both A and B
4. energetic flux unit
MCQ 153:

Acoustic impedance of human skin is

1. 1.65 × 106 kg m² s-1
2. 1.71 × 106 kg m-2 s-1
3. 2 × 106 kg m-2 s-1
4. 2 × 107 kg m-3 s-2
MCQ 154:

In semiconductors upon increasing temperature, conductivity

1. decreases
2. increases
3. remains constant
4. haphazard
MCQ 155:

If a billion electrons enter a point in 1 s, then number of electrons leaving that point in 1 s are

1. 2 billion
2. 3 billion
3. 1 billion
4. 10 billion

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