Question

The current passing through a resistor in a circuit is 0.01 A when the voltage across

the same resistor is 5 V. What current passes through this resistor when the voltage

across it is 7.5 V? ​

Answer 1

Answer:

5 V = 0. 01

7.5 = X

X= 7.5× 0.01/5=0.03/2=0.015A

Answer 2

Given,

Current passing through a resistor in a circuit = 0.01 A

Voltage supply across the resistor = 5 V

To find,

Current passing through the resistor in the circuit when voltage supply across it is increased to 7.5V.

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 "

=> Resistance = voltage/current

=> current = voltage/resistance

Now, by using this formula, we can calculate the total resistance of the resistor, as follows;

Resistance of the resistor

= voltage supply/current drawn

= 5 V / 0.01 A

= 500 ohms

Now, according to the question;

Current passing through the resistor of resistance 500 ohms in the circuit when voltage supply across it is increased to 7.5V

= voltage supply/resistance

= 7.5 V / 500 ohms

= 0.015 A

Hence, 0.015 A current flows through the circuit when the voltage supply across it is increased to 7.5V.