Question

in an experiment student connected an ammeter three resistor 10,20and30 circuit can be completed bya movable contact M,at x

Answer 1

If M is connected with X and you have resistance in the part of the circuit =10 Ohm, current =0.6 A.

Now the Voltage given by the different cell =10x0.6= 6V.

Therefore M Is connected with the Y, then the resistance of circuit become R=10+20= 30OHM, here the voltage will be stay same, I= 6/30=0.2 A.

Hope it is right answer for the student to get an ideas of it.