A galvanometer having a resistance G and current I_g flowing in i… - Vidyadip

MCQ

A galvanometer having a resistance $G$ and current $I_g$ flowing in it, produces full scale defection. If $S_1$ is the value of shunt which converts it into an ammeter of range $0-I$ and $S_2$ is the value of shunt for range $0-8I$ . Then the ratio $\frac {S_1}{S_2}$ will be

A
$\frac{{8I - {I_g}}}{{I - {I_g}}}$
B
$1$
C
$8$
D
$\frac{1}{2}\left( {\frac{{I - {I_g}}}{{8I - {I_g}}}} \right)$

✓

Answer

$\frac{{{S_1}}}{{{S_2}}} = \frac{{\frac{{{I_g}{R_g}}}{{I - {I_g}}}}}{{\frac{{{I_g}{R_g}}}{{8I - {I_g}}}}} = \frac{{8I - {I_g}}}{{I - {I_g}}}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Magnetic Effect of Current→Magnetic Effect of Current — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The figure given below shows the cooling curve of pure wax material after heating. It cools from $A$ to $B$ and solidifies along $B D$. If $L$ and $C$ are respective values of latent heat and the specific heat of the liquid wax, the ratio $L / C$ is

A weight lifter lifts $300 \mathrm{~kg}$ from the ground to a height of $2$ meter in $3$ second. The average power generated by him is

In the figure given two processes $A$ and $B$ are shown by which a thermo-dynamical system goes from initial to final state $F$. If $\Delta Q_A$ and $\Delta Q_B$ are respectively the heats supplied to the systems then

Two balls are dropped from heights $h$ and $2 h$ respectively from the earth surface. The ratio of time of these balls to reach the earth is

An object of $1 \mathrm{~kg}$ mass has a momentum of $10 \mathrm{~kg} \mathrm{~m} / \mathrm{sec}$ then the kinetic energy of the object will be

light coming from a star is observed to have a wavelength of $3737\mathring A$, while its real wavelength is $3700 \mathring A$. The speed of the star relative to the earth is [Speed of light $3 \times 10^8 m / s$ ]

Two masses $m_A$ and $m_B$ moving with velocities $v_A$ and $v_B$ in opposite directions collide elastically. After that the masses $m_A$ and $m_B$ move with velocity $v_B$ and $v_A$ respectively. The ratio $\left(m_A / m_B\right)$ is

Masses of two substances are $1 g$ and $9 g$ respectively. If their kinetic energies are same, then the ratio of their momentum will be

A table is revolving on its axis at 5 revolutions per second. A sound source of frequency $1000 \mathrm{~Hz}$ is fixed on the table at $70 \mathrm{~cm}$ from the axis. The minimum frequency heard by a listener standing at a distance from the table will be (speed of sound = $352 \mathrm{~m} / \mathrm{s}$ )

An object is at a distance of $0.5 \mathrm{~m}$ in front of a plane mirror. Distance between the object and image is