PSC Examination Expected Questions - 142

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Physics
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1. In the visible spectrum the colour having the shortest wavelength is ?
Answer :- Violet

2. Cloudy nights are warmer than clear nights because of ?
Answer :- Isolation

3. A concave lens always forms an image which is ...?
Answer :- Virtual and erect

4. Magnetic field of electric current was discovered by ?
Answer :- Faraday

5. Fish can survive inside a frozen lake because?
Answer :- Water near the button does not freeze

6. A rocket works on the principle of conservation of ?
Answer :- Linear momentum

7. Pitch is a characteristic of sound that depend upon its?
Answer :- Frequency

8. A thermostat is a device for ...?
Answer :- Regulating temperature

9. Ampere is the unit of ?
Answer :- Electric current

10. Which is more elastic, rubber or steel?
Answer :- Steel