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IGCSE A Level Physics Practice Test 21

# Analogue and Digital Signals Quiz Questions and Answers PDF - 21

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## Analogue and Digital Signals Questions and Answers : Quiz 21

MCQ 101: Voltage signal generated by a microphone is

1. digital in nature
2. analogue in nature
3. consists of bits and bytes
4. hybrid in nature

MCQ 102: If the connections across the resistor are reversed, then graph between current and potential difference is

1. variable
2. straight lined
3. constant
4. inverted

MCQ 103: Frequency below which no electrons are emitted from metal surface is

1. minimum frequency
2. angular frequency
3. maximum frequency
4. threshold frequency

MCQ 104: An uncharged object has

1. more protons
2. more electrons
3. equal electrons and protons
4. no protons and electrons

MCQ 105: Energy transferred per unit charge is

1. EMF
2. current
3. potential difference
4. conventional current

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