Q1 of 50 Page 380

No current flows between two charged bodies when connected, if they have the same:

According to Ohm’s Law current only flows when there is a potential difference, if the potential difference is zero then no current will flow.

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9

Find the equivalent resistance of the following combination of resistors:

 10

(a) Express ohm’s law by a mathematical formula.

(b) Draw a circuit diagram to verify ohm’s law.


(c) Present the relationship between the voltage applied across a conductor and the current flowing through it graphically.

 2

If a wire of resistance R is melted and recast to half of its length, then new resistance of the wire will be:

 3

n equal resistors are first connected in series and then connected in parallel. The ratio of the maximum to the minimum resistance is: