Question

What is the voltage measured with a voltmeter across a wire in a circuit?

a) the voltage is the same as the voltage across the power source
b) the voltage is half of the voltage of the power source
c) the voltag is zero
d) a voltmeter cannot measure the voltage across a wire

Answer 1

C) The voltage is zero.

Answer 2

Answer;

The voltage is zero

Explanation;

• Voltage is the potential difference between two points in a circuit or the electromotive force in a given circuit and is expressed in volts (V).

• Voltage is measured by a device called voltmeter that is always connected in parallel with the current source.

• When voltage is measured between two points on a wire in a circuit with zero or no resistance in between the two points then the voltage will be zero. From the ohm's Law, voltage is given the product of resistance and current and thus if the resistance is zero then the voltage will be zero.