Q9 of 50 Page 379

Find the equivalent resistance of the following combination of resistors:

The resistance across AB is given by,

The resistance across CD is (3+5) Ω

The resistance across EF is

Now, the internal resistance of the cell is in series with

Two resistors of 5 Ω and 10 Ω are connected in parallel. Eight such sets are connected in series.

Find the equivalent resistance of this combination.

In the circuit shown in figure, calculate

(i) the current through the arms AB, AC and CDE,

(ii) the potential difference across AB, CD and DE.

(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.

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