Ammeter

For designing a voltmeter of range $50 \mathrm{V}$ and an ammeter of range $10 \mathrm{mA}$ using a galvanometer which has a coil of resistance $54 \Omega$ showing a full scale deflection for $1 \mathrm{mA}$ as in figure.

(A) for voltmeter $R\approx 50 \mathrm{k}\Omega$

(B) for ammeter $r\approx 0.2 \Omega$

(C) for ammeter $r\approx 6 \Omega$

(D) for voltmeter $R\approx 5 \mathrm{k}\Omega$

(E) for voltmeter $R\approx 500 \Omega$

Choose the correct answer from the options given below:

Find reading of ammeter.

A galvanometer of resistance $G \mathrm{\Omega }$ is shunted with $S \mathrm{\Omega }$. The effective resistance of the combination is $R_a$. Then which of the following statements is true

Find the current in $6 \mathrm{\Omega }$ resistance. If an ammeter of $3 \mathrm{\Omega }$ resistance, is connected in parallel with $6 \mathrm{\Omega }$ than find its reading.

The deflection in galvanometer falls to ${\left(\frac{1}{4}\right)}^{th}$, when it is shunted by $3 \Omega$ . If additional shunt of $\mathrm{2 \Omega }$ is connected in parallel to earlier shunt, the deflection in galvanometer falls to ${\left(\frac{1}{\alpha }\right)}^{th}$ value. Write the value of $2\alpha$.

Two identical fuses are rated at $10A$

To convert a galvanometer into an ammeter, one should connect

The coil of a moving coil galvanometer has an effective area of $4\times {10}^{-2}{ \mathrm{m}}^2.$ It is suspended in a magnetic field of $5\times {10}^{-2} {\mathrm{wbm}}^{-2}.$ If the deflection in the galvanometer coil is $0.2 \mathrm{rad}$ when a current of $5 \mathrm{mA}$ is passed through it, then

A galvanometer of resistance $40 \mathrm{\Omega }$ gives a deflection of $10$ divisions per $m A.$ There are $50$ divisions on the scale. Maximum current that can pass through it when a shunt resistance of $2 \mathrm{\Omega }$ is connected is $\_\_\_\_\_\_\_\_\_$

A $50\mathrm{ }\mathrm{\Omega }$ resistance is connected to a battery of $5 \mathrm{V}$. A galvanometer of resistance $100\mathrm{ }\mathrm{\Omega }$ is to be used as an ammeter to measure current through the resistance, for this a resistance $r_{\mathit{S}}$ is connected to the galvanometer. Which of the following connections should be employed if the measured current is within $1\%$ of the current without the ammeter in the circuit?

A galvanometer has current sensitivity of $10$ divisions per milliampere with $150$ equal divisions. Find shunt resistance required to convert given galvanometer into an ammeter of range $6 \mathrm{A}$?

A galvanometer has current sensitivity of $10$ divisions per $\mathrm{mA}$ with $150$ equal divisions. The shunt resistance in $\mathrm{m\Omega }$ required to convert given galvanometer into an ammeter of range $6 \mathrm{A}$ is $x$. Write the value of $10x$ to the nearest integer. Here, galvanometer voltage is $75 \mathrm{mV}$.

If an ammeter is to be used in place of a voltmeter, then with the ammeter we must connect a,

The ammeter has range of $1$ $\mathrm{A}$, without shunt. The range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature as

A moving coil galvanometer of resistance $100 \mathrm{\Omega }$ is used as an ammeter using a resistance $0.1 \mathrm{\Omega }$. The maximum deflection current in the galvanometer is $100 \mathrm{\mu A}$. Find the minimum current in the circuit so that the ammeter shows maximum deflection.

The resistance of an ammeter formed by converting a galvanometer will be:

A galvanometer having a resistance of $8 \mathrm{\Omega }$ is shunted by a wire of resistance $2 \mathrm{\Omega }.$ If the total current is $1 \mathrm{A},$ the part of it passing through the shunt will be