An electric circuit consisting of a 0.5m long nichrome wire XY, an ammeter, a voltmeter, four cells of `1.5V` each and a plug key was set up.
(i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY.
(ii) Following graoh was plotted between V and I values:

What would be the values of `(V)/(I)` rations when the potential difference is `0.8V, 1.2V` and `1.6V` respectively? What conclusion do you draw from these values?
(iii) What is the resistance of the wire?

(a) Name an instrument that measures electric current in a curcuit. Define the unit of eletric current. (b) What do the following symbols, (Fig. 3.58) mean in a circuit diagram ? ( c) An electric circuit consisting of a 0.5 m long nichrome wire XY , an ammeter, a voltmeter, four cells of 1.5 V each and a plug key was set up. (i) Draw a diagram of this electric circuit to study the relation between the potential difference maintained between the points 'X' and 'Y' and the electric current flowing through XY . (ii) Graph shown in (Fig. 3.59) was plotted V and I values. What would be the values of v//I ratios when the potential differences are 0.8 V, 1.2 V and 1.6 V respectively ? What conclusion do you draw from these values ? , .

Potential difference between the points P and Q in the electric circuit shown is

P.D. between the points P and Q in the electric circuit shown is (V)

The relation between potential difference (V) and Current (I) is :___________.

An electric circuit consisting of a 1 m long metallic wire XY, an ammeter, a voltmeter, 4 cells of 1.5 V and a plug key was set up. Draw a schematic diagram of this electric circuit on the on positon. Following grpah was plotted between the values of potential difference and current. what conclusins do you draw about the relation between V and I from this graph? state this relations in your words.

There is a electric circuit as shown in the figure. Find potential difference between points a and b.