A moving coil galvanometer is converted into an ammeter reading upto $0.03\,A$ by connecting a shunt of resistance $4r$ across it and into an ammeter reading upto $0.06\,A$ when a shunt of resistance $r$ is connected across it. What is the maximum current which can be sent through this galvanometer if no shunt is used ............... $A$
Medium
Download our app for free and get started
$\frac{{{i_g}}}{i} = \frac{S}{{G + S}} \Rightarrow {i_g}G = (i - {i_g})S$
$\therefore $ ${i_g}G = (0.03 - {i_g})4r$ ..... $(i)$
and ${i_g}G = (0.06 - {i_g})r$ ..... $(ii)$
From $(i)$ and $(ii)$
$0.12 - 4{i_g} = 0.06 - {i_g}$ $ \Rightarrow {i_g} = 0.02A$.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1Ratio of electric and magnetic field due of moving point charge if its speed is $4.5 \times 10^{5} \;m / s$View Solution
- 2Two long parallel wires carrying currents $8\,A$ and $15\,A$ in opposite directions are placed at a distance of $7\,cm$ from each other. A point $P$ is at equidistant from both the wires such that the lines joining the point $P$ to the wires are perpendicular to each other. The magnitude of magnetic field at $P$ is $............\times 10^{-6}\,T$. (Given : $\left.\sqrt{2}=1.4\right)$View Solution
- 3A proton is projected with a velocity $10^7\, m/s$, at right angles to a uniform magnetic field of induction $100\, mT$. The time (in second) taken by the proton to traverse $90^o$ arc is $(m_p = 1.65\times10^{-27}\, kg$ and $q_p = 1.6\times10^{-19}\, C)$View Solution
- 4Statement $-1$ : Ampere law can be used to find magnetic field due to finite length of a straight current carrying wire.View Solution
Statement $-2$ : The magnetic field due to finite length of a straight current carrying wire is symmetric about the wire.
- 5The figure shows three situations when an electron with velocity $\vec v$ travels through a nuniform magnetic field $\vec B$ . In each case, what is the direction of magnetic force on the electron?View Solution
- 6A deuteron and a proton moving with equal kinetic energy enter into to a uniform magnetic field at right angle to the field. If $r_{d}$ and $r_{p}$ are the radii of their circular paths respectively, then the ratio $\frac{r_{d}}{r_{p}}$ will be $\sqrt{ x }: 1$ where $x$ is ..........View Solution
- 7A galvanometer of $100\,\Omega $ resistance gives full scale deflection when $10\, mA$ of current is passed. To convert it into $10\, A$ range ammeter, the resistance of the shunt required will be ............... $\Omega $View Solution
- 8View SolutionOne Tesla is equal to
- 9View SolutionUnit of magnetic permeability is
- 10In the following hexagons, made up of two different material $P$ and $Q,$ current enters and leaves from points $X$ and $Y$ respectively. In which case the magnetic field at its centre is not zero.View Solution