Q31 of 72 Page 12

Read the following statements. Write true or false against each:
(i)   The quantity of charge flowing past a point multiplied by the time gives the current.
(ii)  The flow of charge through a conducting wire, connected to a cell, is due to the chemical reaction inside the cell.
(iii) The resistivity of all pure metals increases with rise in temperature.
(iv) Ohm's law is a relation between the power used, the current and the potential difference in a circuit.
(v)  A series circuit has only one conducting path for the electrons that move through it; a parallel circuit has multiple conducting paths.
(vi) A conducting wire offers resistance to the flow of electrons because electrons repel each other in the wire.

(i)   False. The current is defined as the amount of charge flowing per second. I = Q / t.
(ii)  True.
(iii) True.
(iv) False, Ohm's law is a relation between the current in a wire and the potential difference between its ends (V = IR)
(v)  True.
(vi) False, the resistance is because of attraction of the atoms among which they move

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