Take a battery and measure the potential difference . Make a circuit and measure the potential difference when the battery is connected in the circuit. Is there any difference in potential difference of battery ?
Let us consider the voltmeter, battery, switch, fuse and Bulb for measuring battery voltage.
Experiment -1. In this Diagram only battery is connected to the voltmeter
which used to determine the voltage (electrical pressure) present at battery as shown in figure below:-
Experiment- 2. In this Diagram voltmeter is connected with circuit in which different electrical equipment is connected to tether as shown in figure below:-
Result :- From the above two experiment we have observed that we measured the voltage from single battery only in 1st experiment while in second experiment we measured the voltage across the circuit.
In 1st experiment directly we measured the voltage from battery when we measured voltage from circuit we found the less voltage of same battery which is connected with circuit because many loads are connected.
Let us consider the voltmeter, battery, switch, fuse and Bulb for measuring battery voltage.
Experiment -1. In this Diagram only battery is connected to the voltmeter
which used to determine the voltage (electrical pressure) present at battery as shown in figure below:-
Experiment- 2. In this Diagram voltmeter is connected with circuit in which different electrical equipment is connected to tether as shown in figure below:-
Connecting one lead of the voltmeter to the input side of a bulb and the other lead to earth results in a reading of the voltage present at the Bulb. Voltmeters are mostly used to measure voltages across components. They are connected in parallel with
the component.
Result :- From the above two experiment we have observed that we measured the voltage from single battery only in 1st experiment while in second experiment we measured the voltage across the circuit.
In 1st experiment directly we measured the voltage from battery when we measured voltage from circuit we found the less voltage of same battery which is connected with circuit because many loads are connected.
Sourse :- www.nrsciencecentre.blogspot.com
© NRSC, Model Prepared by Engineer Affan Nomani, Research Scholar & Writer
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