Chapter 19, Problem 23Q

To determine

To Explain:

Why a voltmeter always reads less than the actual voltage?

Answer to Problem 23Q

Solution:

Voltage always reads the less voltage than the actual voltage, because voltmeterdraws some voltage from the circuit, and thus, gives less reading than actual.

Explanation of Solution

Voltmeter is a device which is used to measure the voltage across two points, and for this purpose voltmeter connects in the parallel to the equipment,across which voltage is to be measured.

The resistance of the voltmeter is also very high so that it draws minimum current from the circuit, but still the resistances of the voltmeter draws some of the current from the circuit, and thus, calculate the less reading.