WIRING JOINTS AND SOLDERING - Practice Mode

1) Which is called valance electron in an atom?

Half the total No of electron No: of electron in middle orbit No: of electron in inner most orbit No: of electron in the outer most orbit

Correct Answer: No: of electron in the outer most orbit

2) How many electrons are in a copper atom?

27 28 29 30

Correct Answer: 29

3) How many number of electrons will move in one second for one ampere current through the conductor?

6.24 X 1015 6.24 X 1016 6.24 X 1017 6.24 X 1018

Correct Answer: 6.24 X 1018

4) What is the property of direct current?

Magnitude and direction of current changes with time Magnitude and direction of current remains constant Direction of current changes with time Magnitude of current changes with time

Correct Answer: Magnitude and direction of current remains constant

5) Which effect is produced, if the current is passed through a conductor?

Thermal effect Magnetic effect Chemical effect Electrostatic effect

Correct Answer: Thermal effect

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