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UPSC CAPF AC Paper - I
IMPORTANT
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Light Emitting Diode (LED) converts_____.

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Important Questions on Physics

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 80
The Current (I) Voltage (V) plot of a certain electronic device is given above.The device is:
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 81
The electric current passing through a metallic wire produces heat because of
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 82
Two charges of 40 μC and -20 μC are kept some distance apart. Now, they are touched and kept at the same distance apart. The ratio of the initial and the final forces between them is
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 83

Consider the following statements

1. A thermoelectric refrigerator works on Peltier effect.

2. The electrolyte in the dry cell is ammonium chloride.

3. The electrolyte in a car battery is sulphuric acid.

4. When a metal is heated, its resistance increases.

Which of the statements given above are correct?

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 84

Consider the following statements

1. Constantan wire is used in making standard resistance because its temperature co-efficient of resistance is negligible.

2. Thermocouple thermometer is based on Peltier effect.

3. Potentiometer measures potential more accurately because it measures potential in the open circuit.

4. In an electrolysis, the amount of mass deposited or liberated at an electrode is directly proportional to amount of charge.

Which of the statements given above are correct?

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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 85
The phenomenon of electromagnetic induction implies a production of induced :
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 86
Which of the adjoining graph represent ohmic resistance?
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UPSC CAPF AC Paper - I
IMPORTANT
14000+ Objective Questions General Studies>Chapter 9 - Physics>Exercise 6>Q 87
Two long wires, each carrying a DC current in the same direction are placed close to each other. Which one of the following statements is correct?