(A) The actual current $i$ flowing through the circuit can be calculated using Faraday's law of electrolysis: $m = Z i t$.Given: $m = 2.0124\, g$, $Z

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(A) The actual current $i$ flowing through the circuit can be calculated using Faraday's law of electrolysis: $m = Z i t$.Given: $m = 2.0124\, g$, $Z = 1.118 \times 10^{-3}\, g\, C^{-1}$, and $t = 1\, \text{hour} = 3600\, s$.Rearranging for current: $i = \frac{m}{Z t}$.Substituting the values: $i = \frac{2.0124}{1.118 \times 10^{-3} \times 3600} = \frac{2.0124}{4.0248} = 0.5\, A$.The error in the ammeter reading is defined as: $\text{Error} = \text{Measured value} - \text{Actual value}$.$\text{Error} = 0.54\, A - 0.5\, A = + 0.04\, A$.

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

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An ammeter, suspected to give inaccurate reading, is connected in series with a silver voltameter. The ammeter indicates $0.54\, A$. A steady current passed for one hour deposits $2.0124\, g$ of silver. If the $E.C.E.$ of silver is $1.118 \times 10^{-3}\, g\, C^{-1}$, then the error in ammeter reading is ................ $A$.

A
$+ 0.04$
B
$+ 0.02$
C
$- 0.03$
D
$- 0.01$

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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

An ammeter reads up to $1\, A$. Its internal resistance is $0.81\, \Omega$. To increase the range to $10\, A$,the value of the required shunt is ............ $\Omega$.

MediumAIEEE 2003

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An ammeter with a resistance of $2 \,\Omega$ can measure up to $100 \,mA$. What resistance (in $\Omega$) must be connected in series to make it measure up to $5 \,V$?

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$A$ galvanometer of resistance $10 \Omega$ changes its range from $1 \text{ mA}$ to $101 \text{ mA}$ when a resistive wire is connected in parallel. If the resistivity of the material of the wire and its area of cross-section are $1 \times 10^{-6} \Omega \text{ m}$ and $1 \text{ mm}^2$ respectively,then the length of the wire is (in $cm$)

EasyAP EAMCET 2017

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$A$ galvanometer has a $50$ division scale. The battery has no internal resistance. It is found that there is a deflection of $40$ divisions when $R = 2400\,\Omega$. The deflection becomes $20$ divisions when the resistance taken from the resistance box is $4900\,\Omega$. Then we can conclude:

DifficultJEE MAIN 2016

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$A$ stray magnetic field does $\underline{\text{NOT}}$ affect the deflection of a moving coil galvanometer because

EasyMHT CET 2020

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An ammeter reads up to $1\, A$. Its internal resistance is $0.81\, \Omega$. To increase the range to $10\, A$,the value of the required shunt is ............ $\Omega$.

An ammeter with a resistance of $2 \,\Omega$ can measure up to $100 \,mA$. What resistance (in $\Omega$) must be connected in series to make it measure up to $5 \,V$?

$A$ galvanometer has a $50$ division scale. The battery has no internal resistance. It is found that there is a deflection of $40$ divisions when $R = 2400\,\Omega$. The deflection becomes $20$ divisions when the resistance taken from the resistance box is $4900\,\Omega$. Then we can conclude:

$A$ stray magnetic field does $\underline{\text{NOT}}$ affect the deflection of a moving coil galvanometer because

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