(C) To convert a galvanometer into an ammeter,a shunt resistance $S$ must be connected in parallel with the galvanometer.The formula for the shunt res

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putting in parallel a resistance of $15\,\Omega$

(C) To convert a galvanometer into an ammeter,a shunt resistance $S$ must be connected in parallel with the galvanometer.The formula for the shunt resistance is $i_g G = (I - i_g) S$,where $i_g$ is the full-scale deflection current,$G$ is the galvanometer resistance,and $I$ is the maximum current to be measured.Given: $G = 60\,\Omega$,$i_g = 1.0\,A$,and $I = 5.0\,A$.Substituting the values: $1.0 \times 60 = (5.0 - 1.0) \times S$.$60 = 4 \times S$.$S = \frac{60}{4} = 15\,\Omega$.Therefore,a resistance of $15\,\Omega$ must be connected in parallel.

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

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$A$ galvanometer having a coil resistance of $60\,\Omega$ shows full-scale deflection when a current of $1.0\,A$ passes through it. It can be converted into an ammeter to read currents up to $5.0\,A$ by:

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A
putting in series a resistance of $15\,\Omega$
B
putting in series a resistance of $240\,\Omega$
C
putting in parallel a resistance of $15\,\Omega$
D
putting in parallel a resistance of $240\,\Omega$

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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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When an additional resistance $1980 \ \Omega$ is connected in series with a voltmeter,each scale division has $100$ times larger value. The resistance of the voltmeter is (in $\Omega$)

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$A$ galvanometer with a resistance of $8 \, \Omega$ is connected to a shunt of $2 \, \Omega$. If the total current is $1 \, A$,how much current in $A$ passes through the shunt?

Medium

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The current sensitivity of a galvanometer can be increased by:
$(A)$ decreasing the number of turns
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$(D)$ decreasing the torsional constant of the spring
Choose the most appropriate answer from the options given below.

MediumJEE MAIN 2022

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$A$ galvanometer has a resistance of $50 \ \Omega$ and it allows a maximum current of $5 \ mA$. It can be converted into a voltmeter to measure up to $100 \ V$ by connecting in series a resistor of resistance: (in $\Omega$)

DifficultJEE MAIN 2024

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$A$ voltmeter of resistance $1000\,\Omega$ gives full scale deflection when a current of $100\,mA$ flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading $1\,A$ at full scale deflection is ............... $\Omega$.

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$A$ galvanometer having a coil resistance of $60\,\Omega$ shows full-scale deflection when a current of $1.0\,A$ passes through it. It can be converted into an ammeter to read currents up to $5.0\,A$ by:

Similar Questions

When an additional resistance $1980 \ \Omega$ is connected in series with a voltmeter,each scale division has $100$ times larger value. The resistance of the voltmeter is (in $\Omega$)

$A$ galvanometer with a resistance of $8 \, \Omega$ is connected to a shunt of $2 \, \Omega$. If the total current is $1 \, A$,how much current in $A$ passes through the shunt?

The current sensitivity of a galvanometer can be increased by:$(A)$ decreasing the number of turns$(B)$ increasing the magnetic field$(C)$ decreasing the area of the coil$(D)$ decreasing the torsional constant of the springChoose the most appropriate answer from the options given below.

$A$ galvanometer has a resistance of $50 \ \Omega$ and it allows a maximum current of $5 \ mA$. It can be converted into a voltmeter to measure up to $100 \ V$ by connecting in series a resistor of resistance: (in $\Omega$)

$A$ voltmeter of resistance $1000\,\Omega$ gives full scale deflection when a current of $100\,mA$ flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading $1\,A$ at full scale deflection is ............... $\Omega$.

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The current sensitivity of a galvanometer can be increased by:
$(A)$ decreasing the number of turns
$(B)$ increasing the magnetic field
$(C)$ decreasing the area of the coil
$(D)$ decreasing the torsional constant of the spring
Choose the most appropriate answer from the options given below.