Kerala Board Solutions for Chapter: Current Electricity, Exercise 3: Let us assess

In an electrical circuit if $100$ J work is done to move $10$ C electric charge from point A to the point B, find out the potential difference between the points A and B.

$6$ electric cells are connected in series in an electronic device which works at $9$ V potential difference. Find out emf of one cell.

An ammeter that connects to an electronic circuit shows a reading of $2$ A. Find how many charges flows through the ammeter in $10$s. 

When a conductor is stretched, its length becomes double. Find out how many times the resistance changes. 

In the given graphs which is the graph depicting Ohm's Law? Justify your answer.

A conductor of $5\Omega$ has length $2$ m and area of cross-section $2$ $m^2$. If so, find out the resistivity of the material of the conductor.

Draw a circuit diagram describing how $6$ Torch cells should be connected to a bulb and a switch to obtain effective voltage of $9$$\mathrm{V}$.