A current i passes through a wire of length $l$, radius of cross-section $r$ and resistivity $\rho$. The rate of heat generation is
Easy
Download our app for free and get started
(a) $H = {i^2}Rt$ $ \Rightarrow $ $\frac{H}{t} = {i^2}R = \frac{{{i^2}\rho l}}{{\pi \,{r^2}}}$
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
- 1Which of the following wiring diagrams could be used to experimentally determine $R$ using ohm's law? Assume an ideal voltmeter and an ideal ammeter.View Solution
- 2In the circuit shown in the figure, no current flows through the ideal ammeter. If the internal resistance of the cell is negligible, the value of unknown resistance $R $ is .............. $\Omega$View Solution
- 3View SolutionThe current in the adjoining circuit will be
- 4A parallel combination of two resistors, of $1 \,\Omega$ each, is connected in series with a $1.5 \,\Omega$ resistor. The total combination is connected across a $10\, V$ battery. The current flowing in the circuit is .............. $A$View Solution
- 5A current of $1\, mA$ is flowing through a copper wire. How many electrons will pass a given point in one secondView Solution
- 6View SolutionWhen a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become ........ times
- 7Find out the value of current through $2\,\Omega$ resistance for the given circuit ............ $A$View Solution
- 8In this figure the resistance of the coil of galvanometer $G$ is $2\,\Omega$. The emf of the cell is $4\,V$. The ratio of potential difference across $C_1$ and $C_2$ is:View Solution
- 9A current source drives a current in a coil of resistance $R_1$ for a time $t$. The same source drives current in another coil of resistance $R_2$ for same time. If heat generated is same, find internal resistance of source.View Solution
- 10In the given current distribution what is the value of $I$ .............. $A$View Solution
