BASIC ELECTRICAL PRACTICE - Practice Mode

1) How many electrons are there in the third cell of the copper atom?

8 13 18 29

Correct Answer: 18

Explanation:

18 electrons are there in the third shell of copper atom.

2) Which is the semiconductor material?

Eureka Ebonite Manganin Germanium

Correct Answer: Germanium

3) What is the indication of neon polarity indicator used for checking A.C. supply?

Both electrodes will glow Only one electrode will glow Both electrodes will be flickering One electrode will glow and another will be flickering

Correct Answer: Both electrodes will glow

4) Calculate the electrical energy in unit consumed by 500W lamp for 5 hours.

0.5 unit 1.0 unit 1.5 unit 2.5 unit

Correct Answer: 2.5 unit

5) What is the value of hot resistance of a bulb rated as 100W/250V?

31.25 ohm 62.50 ohm 312.50 ohm 625.00 ohm

Correct Answer: 625.00 ohm

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