Kumar Mittal Solutions for Exercise 1: QUESTIONS

The coil of a galvanometer has a resistance of $100 \Omega$. It shows full-scale deflection for a current of$5 \times {10}^{-4} \mathrm{A}$. To convert it into a voltmeter to read a maximum potential difference of$5 \mathrm{V}$, resistance(in $\Omega$) added in the series is

A $50 \Omega$ resistance galvanometer has $25$ divisions on its scale. On sending a current of$4.0 \times {10}^{-4} A$ in it, the pointer gives a deflection of $1$ division. How much resistance should be connected in series with the galvanometer to convert it into a voltmeter of $2.5 V$ range?  

The resistance of a voltmeter is $180 \Omega$. When there is $5 V$ potential difference across its ends, it gives full-scale deflection. What resistance (in ohms) should be connected in series to obtain a full-scale deflection at$25 V$?

A galvanometer coil has a resistance of $15 \Omega$ and it shows full-scale deflection for a current of $2.0 \mathrm{mA}$. Shunt required(in $\Omega$) to convert it into an ammeter of range $0$ to $5.0 \mathrm{A}$ in nearest integer is

A galvanometer coil has a resistance of $15 \Omega$ and it shows full-scale deflection for a current of$2.0 \mathrm{mA}$. It is converted into a voltmeter of range$0$ to $15.0 \mathrm{V}$. Determine the net resistance of the voltmeter in $\Omega$.

A galvanometer with a coil of resistance $12.0 \mathrm{\Omega }$ shows a full-scale deflection for a current of $2.5 \mathrm{mA}$. How will you convert it into an ammeter of range$0$ to$7.5 \mathrm{A}$?

A galvanometer with a coil of resistance $12.0 \Omega$ shows a full-scale deflection for a current of$2.5 mA$. How will you convert it into (b) a voltmeter of range $0$ to $10.0 V$?

The given circuit is used to measure the resistance R. The ammeter reads $2 A$ and the voltmeter $120 V.$ What is the value of R if the resistance of the voltmeter is $3000 \Omega$? If the resistance of the voltmeter is taken to be infinitely large, then what is the value of $R$.