A copper voltameter is connected in series wi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) According to Faraday's law of electrolysis, the mass $m$ deposited is given by $m = Z i t$, where $Z$ is the electrochemical equivalent, $i$ is th

Vedclass · Accepted Answer

$750$

Vedclass · Answer

(A) According to Faraday's law of electrolysis, the mass $m$ deposited is given by $m = Z i t$, where $Z$ is the electrochemical equivalent, $i$ is the current, and $t$ is the time in seconds.Given: $m = 0.99\,g$, $Z = 0.00033\,g/C$, $t = 20\, 	ext{minutes} = 20 	imes 60 = 1200\,s$.Calculating the current $i$:$i = \frac{m}{Zt} = \frac{0.99}{0.00033 	imes 1200} = \frac{0.99}{0.396} = 2.5\,A$.Now, the heat generated $H$ in the heater coil of resistance $R = 0.1\,\Omega$ is given by Joule's law of heating:$H = i^2 R t = (2.5)^2 	imes 0.1 	imes 1200 = 6.25 	imes 0.1 	imes 1200 = 0.625 	imes 1200 = 750\,J$.

Similar Questions

The Peltier coefficient of a thermocouple is $2 \times 10^{-9} \, V$. How much heat is developed at a junction if a $2.5 \, A$ current flows for $2 \, min$?

The temperature dependence of resistances of $Cu$ and undoped $Si$ in the temperature range $300-400 \ K$,is best described by

In a copper voltameter,the mass deposited in $6 \text{ min}$ is $m \text{ g}$. If the current-time graph for the voltameter is as shown in the figure,then the $E.C.E.$ of the copper is:

The Peltier coefficient is $2 \times 10^{-9} \, V$. How much heat in $ergs$ is produced when a current of $2.5 \, A$ is passed for $2 \, minutes$?

The Thomson coefficient of a conductor is $10 \mu V/K$. The two ends of the conductor are kept at $50^{\circ} C$ and $60^{\circ} C$, respectively. The amount of heat absorbed by the conductor when a charge of $10 C$ flows through it is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module