A resistor, R1, is connected to an ideal battery (no internal resistance) and a

Question

A resistor, R1, is connected to an ideal battery (no internal resistance) and a current I1 = 0.31 A flows through the circuit.

The first resistor, R1, is then removed from the circuit and a differnt resistor, R2, is placed in the circuit in place of R1. The new resistor has a resistance R2 = 1.8 R1. A new current I2 flows.

What is the new current, I2?

Give your answer in A to three significant figures.

A resistor, R1, is connected to an ideal battery (no internal resistance) and a current I1 = 0. 31 A flows through the circuit. The first resistor, R1, is then removed from the circuit and a different resistor, R2, is placed in the circuit in place of R1. The new resistor has a resistance R2 = 1. 8 R1. A new current I2 flows. What is the new current, I2? Give your answer in A to three significant figures.

Explanation / Answer

using Ohm's Law , V=IR

=> if V is constant I is proportional to 1/R,

=> I2 = 0.31/1.8

=> I2 =0.172 A

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