The formula for ohm's law can be written: i equals i x v v / r r / v

As per ohm's law we can say that when we apply voltage difference V across a resistor of resistance R then current flow across the resistance at constant temperature is directly proportional to the applied voltage difference

this is given as

on rearranging the above equation we will have

so the correct answer would be

I = V / R

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

i don't understand. explain it clearly