1. Purely Resistive Circuit:

* Current would double.

* In a purely resistive circuit (like a simple light bulb), the relationship between voltage, current, and resistance is defined by Ohm's Law: V = I * R

* If you double the voltage (V) and resistance (R) stays the same, the current (I) must also double to maintain the equation.

2. Circuit with Non-Linear Components:

* Current might not double.

* Circuits containing components like diodes, transistors, or motors don't follow a simple linear relationship like Ohm's Law.

* Doubling the voltage in these circuits might result in a different change in current, depending on the specific component and its characteristics.

Example:

Let's say we have a light bulb with a resistance of 10 ohms. If we apply 10 volts across it, the current would be:

* I = V/R = 10V / 10 ohms = 1 Ampere

Now, if we double the voltage to 20 volts:

* I = V/R = 20V / 10 ohms = 2 Amperes

As you can see, the current doubled because the circuit is purely resistive.

Important Note:

* Power would quadruple. In any circuit, power (P) is calculated as P = V * I. If you double the voltage and the current doubles, the power increases by a factor of four. This is why it's crucial to understand the power handling capabilities of your circuit components.