Question

The resistance in a circuit is
halved. What happens to the
voltage?
(1 point)
V = IR
The voltage is halved.
The voltage remains
the same.
The voltage is
increased by a factor
of 4.
The voltage is
doubled.

Answer 1

To determine what happens to the voltage when the resistance is halved, we can use Ohm's Law, which states:

\[ V = IR \]

Where:
- \( V \) is the voltage,
- \( I \) is the current,
- \( R \) is the resistance.

If the resistance \( R \) is halved (i.e., \( R/2 \)), and if the current \( I \) remains constant, we can re-write the equation as:

\[ V = I \left(\frac{R}{2}\right) \]

If the current remains constant, then halving the resistance will indeed halve the voltage.

However, if we keep the voltage constant and want to see how the current changes, we would have a different scenario.

But based on your question, if the resistance is halved and the current remains constant, the voltage will be halved.

So the correct answer is:

**The voltage is halved.**