List of top Physics Questions on Electrical Instruments asked in JEE Main

A voltmeter with internal resistance of \(x\) Ω can be used to measure upto 20 V. In order to increase its measuring range to 30 V, the required modification is to ________.
Which of the following resistivity (\(\rho\)) vs temperature (T) curves is most suitable to be used in wire-bound standard resistors?

Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are $V_1$, $V_2$ and $V_3$. 
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Choose the correct option.

The AC voltage across a resistance can be measured using a :