Question

A current of 0.20 A passes through a 3.0 pr019-1.jpg resistor. The resistor is connected in series with a 6.0 V battery and an unknown resistor. What is the resistance value of the unknown resistor?

Answer 1

answer is 27 ohm...am I right

Answer 2

Answer:

the unknown resistance is of 30 ohms.

Explanation:

Since the unknown resistor is connected to the voltage source in series, the current will flow without any obstructing or getting halved (as in case of parallel resistance).

Let the unknown resistance be "R"

given :

Voltage source, V = 6.0 V

Current, I = 0.20 A

So, by Ohm's Law

V = IR

or, R = V / I

or, R = 6.0 / 0.20

or, R = 30 ohm

therefore, the unknown resistance is of 30 ohms.

Ohm's Law : It states that then amount of current flowing through a given conductor and in between two points of the conductor is basically the direct proportion to the voltage across those two points.

Mathematically, V = IR

where, V  = voltage

I  = current

R = Resistance.

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