In a series circuit with three resistors connected to a power source, what would happen to the equivalent resistance and current if you removed any one of the resistors? the equivalent resistance would decrease and the current would increase.

When three resistors are connected in series then total equivalent of all three is given by

Also in this case current is given by

Now if one of the resistance is removed

Then

let one of the resistance is removed

while current flowing in the open circuit will be given by

So here since resistance is decreased then current must be increased in the circuit.

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.