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ICSE Class 9 Answered

Why is a voltameter connected to a point at higher potential and why does it have a very high resistance?
Asked by fairyapoorva11 | 14 Jan, 2015, 11:17: PM
answered-by-expert Expert Answer
A voltmeter is a device used to measure the voltage / potential difference across a component.
 
It is connected parallel to the component through which the voltage is to be measured. Hence, one of its terminal will be connected to a point at higher potential and the other terminal will be connected to a point at lower potential.
 
High resistance allows mimimum current to pass through it. Now, voltmeter is connected in parallel. 
If it has a low resistance, then majority current of the circuit will pass through the voltmeter and accurate reading of the current will not be available at the component.
So, it is connected in parallel due to which least current passes through it and all the current passes through the circuit components.
Answered by Romal Bhansali | 15 Jan, 2015, 10:59: AM

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