Q23 of 50 Page 381

Write true or false for the following statements:

The resistivity of all pure metals increases with increase in temperature.

True

With increase in temperature the random motion of the atoms and electrons in a conductor increases and so the resistance decreases.


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21

Write true or false for the following statements:

The quantity of charge flowing past a point multiplied by time is current.

 22

Write true or false for the following statements:

The flow of charge through a conducting wire connected to a cell is the result of chemical reaction inside the cell.

 24

Write true or false for the following statements:

Ohm’s law is a relation between the power used in a circuit to the current and the potential difference.

 25

Write true or false for the following statements:

A series circuit has only one conducting path for the electrons that move through it; a parallel circuit has multiple conducting paths.