(A) The angular deflection $\theta$ of a moving coil galvanometer is given by the formula: $\theta = \frac{NBAi}{k}$.Here,$N = 500$ (number of turns),

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(A) The angular deflection $\theta$ of a moving coil galvanometer is given by the formula: $\theta = \frac{NBAi}{k}$.Here,$N = 500$ (number of turns),$B = 0.2 \ T$ (magnetic field),$A = 0.001 \ m^2$ (area),$i = 6 \pi \times 10^{-8} \ A$ (current),and $k = 6 \times 10^{-7} \ N-m/rad$ (torsional constant).Substituting these values into the formula:$\theta = \frac{500 \times 0.2 \times 0.001}{6 \times 10^{-7}} \times 6 \pi \times 10^{-8}$$\theta = \frac{100 \times 0.001}{6 \times 10^{-7}} \times 6 \pi \times 10^{-8}$$\theta = \frac{0.1}{6 \times 10^{-7}} \times 6 \pi \times 10^{-8}$$\theta = 0.1 \times \pi \times 10^{-1} = 0.01 \pi = \frac{\pi}{100} \ rad$.

Class 12 Physics Moving Charges and Magnetism The Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion

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$A$ moving coil galvanometer has a rectangular wire coil of enclosed area $0.001 \ m^2$ and $500$ turns. The coil operates in a radial magnetic field of $0.2 \ T$ and carries a current of $6 \pi \times 10^{-8} \ A$. If the torsional spring constant is $6 \times 10^{-7} \ N-m/rad$,then the angular deflection of the coil in radians is

TS EAMCET 2018 All TS EAMCET

A
$\frac{\pi}{100}$
B
$\frac{\pi}{200}$
C
$\frac{\pi}{300}$
D
$\frac{\pi}{400}$

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Class 12

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Moving Charges and Magnetism

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The Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion

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$A$ galvanometer with a resistance of $12 \,\Omega$ gives full-scale deflection when a current of $3 \, mA$ is passed. It is required to convert it into a voltmeter which can read up to $18 \, V$. The resistance to be connected is ............... $\Omega$.

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$A$ galvanometer has a resistance $100 \ \Omega$ and its full-scale deflection current is $10 \ mA$. What is the value of the shunt resistance required so that it can measure current up to $10 \ A$?

Medium

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$A$ galvanometer of resistance $G$ is shunted with a resistance of $10 \%$ of $G$. The part of the total current that flows through the galvanometer is

MediumMHT CET 2023

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$A$ galvanometer has a resistance of $80 \Omega$ and it is shunted with a resistance of $20 \Omega$. If $20 \%$ of the main current flows through the galvanometer, what is the value of the main current (in $\text{ A}$)?

EasyMHT CET 2024

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$A$ galvanometer of resistance $100 \Omega$ requires $10 \mu A$ current for full-scale deflection. If a shunt resistance of $1 \Omega$ is connected in parallel to convert it into an ammeter, what is the minimum current required to obtain full-scale deflection (in $\text{ mA}$)?

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$A$ galvanometer with a resistance of $12 \,\Omega$ gives full-scale deflection when a current of $3 \, mA$ is passed. It is required to convert it into a voltmeter which can read up to $18 \, V$. The resistance to be connected is ............... $\Omega$.

$A$ galvanometer has a resistance $100 \ \Omega$ and its full-scale deflection current is $10 \ mA$. What is the value of the shunt resistance required so that it can measure current up to $10 \ A$?

$A$ galvanometer of resistance $G$ is shunted with a resistance of $10 \%$ of $G$. The part of the total current that flows through the galvanometer is

$A$ galvanometer has a resistance of $80 \Omega$ and it is shunted with a resistance of $20 \Omega$. If $20 \%$ of the main current flows through the galvanometer, what is the value of the main current (in $\text{ A}$)?

$A$ galvanometer of resistance $100 \Omega$ requires $10 \mu A$ current for full-scale deflection. If a shunt resistance of $1 \Omega$ is connected in parallel to convert it into an ammeter, what is the minimum current required to obtain full-scale deflection (in $\text{ mA}$)?

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