Question

In ohms law experiment a student records V = 20 mV and I = 0.5A, then the resistance is​

Answer 1

Answer:

v=IR then R=v/I so,R=10ohm

Answer 2

Given,

In an Ohm's law experiment;

Voltage supply recorded = 20 mV

Total current recorded = 0.5 A

To find,

The resistance.

Solution,

We can simply solve this numerical problem by using the following process:

As per ohms law,

For a voltage V across the conductor, current I flowing through the conductor and resistance R provided by the conductor to the flow of current,

V = RI

=> R = V/I

{Statement-1}

Now, according to the question and statement-1;

The resistance in the given Ohm's law experiment setup

= V/I = (voltage supply recorded)/(total current recorded)

= (20 mV)/(0.5 A)

= (20×10^-3 mV)/(1/2 A)

{Since 1 Volt = 1000 mV

=> 1 mV = 1/1000 V}

= 0.04 ohms

Hence, the resistance in the given Ohm's law experiment setup is equal to 0.04 ohms.