Question

If you double the voltage in a circuit and reduce the resistance by a factor of four what will happen to the current? A) it will double B) it will decrease by a factor of 2 C) it will increase by a factor of 8 D) it will decrease by a factor of 8

Answer 1

Answer: By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.

V = IR

V1/2V1 = I1R1 / I2R1/4

1/2 = 4I1/I2

I2 = 8I1

Therefore, it will increase by a factor of 8. Hope this answers the question.

Explanation: BTW...This is for PLATO users

Answer 2

By Ohm's Law, we can relate current, voltage and resistance. It is expressed as V=IR. That is, there is a direct relationship between voltage and resistance and voltage and current.

V = IR
V1/2V1 = I1R1 / I2R1/4
1/2 = 4I1/I2
I2 = 8I1

Therefore, it will increase by a factor of 8. Hope this answers the question.