Question

Which statement is true according to Ohm’s law?
a. Current will increase by increasing voltage in circuit
b. Resistance will increase by increasing voltage in circuit
c. Resistance will increase by increasing current in circuit
d. Resistance and current both will increase by increasing voltage

Answer 1

Hint: - The resistance of any circuit depends on the material, length, cross-sectional area and temperature of that circuit.
- Resistance does not depend on the current through the circuit or voltage in a circuit. For a given circuit it is constant.
- According to Ohm’s law, \[V = IR\]
- So, voltage\[\;V\]is proportional to the current \[I\].

Complete step by step solution:
According to Ohm’s law, the relation between Resistance R, Current through the resistance And voltage across the resistance \[\;V\]is \[V = IR\].

And, resistance Depends on the material, shape and temperature. It doesn’t depend on potential or current.
So, for a given circuit resistance at a given temperature resistance R is constant.
Then, v∝I
Voltage is proportional to the current, i.e, if the voltage increases current will also increase and if the voltage decreases current will also decrease.

Here, for this problem, option (a) is correct as it states that current will increase by increasing voltage in circuit.

Other options are wrong, as resistance doesn’t depend on voltage or current.

Note: - The resistance of any circuit depends on the material, shape and temperature. It doesn’t depend on potential or current.
- For a given circuit at a given temperature, Voltage is proportional to the current.
- Using this relation: \[V = IR\] we can find out voltage, resistance or current of an electric circuit.