An electric kettle takes 4, A current at 220, | vedclass

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

Question

$	ext { Power }=220\, \mathrm{V} 	imes 4\, \mathrm{A}=880\, 	ext { watts. }=880\, \mathrm{J} / \mathrm{s}$

Heat needed to raise the temperature

Vedclass · Accepted Answer

$6.3$

Vedclass · Answer

$	ext { Power }=220\, \mathrm{V} 	imes 4\, \mathrm{A}=880\, 	ext { watts. }=880\, \mathrm{J} / \mathrm{s}$

Heat needed to raise the temperature of $1\,kg$ water through $80\,^{o} \mathrm{C}$ 

$ = ms.\,\Delta T 	imes 4.2\,{m{J}}/{m{cal}}$

$ = 1000\,{m{g}} 	imes 1\,{m{cal}}/{m{g}} 	imes 80 	imes 4.2\,{m{J}}/{m{cal}}$

$ 	herefore $  Time taken  ${=\frac{1000 	imes 1 	imes 80 	imes 4.2}{880}=\frac{336 	imes 10^{3}}{880}} $ 

${=382\, \mathrm{s}=6.3\, \mathrm{min}}$

An electric kettle takes $4\, A$ current at $220\,V.$ How much time will it take to boil $1\,\, kg$ of water circuits are consequences of from temperature $20\,^o C\, ?$ The temperature of $(a)$ conservation of energy and electric charge boiling water is $100\,^o C.$ ............... $min$

Similar Questions

Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct

In the circuit shown, the resistance $r$ is a variable resistance. If for $r = fR,$ the heat generation in $r$ is maximum then the value of $f$ is

Two identical heaters rated $220\, volt$, $1000\, watt$ are placed in series with each other across $220 \,volt$ lines. If resistance do not change with temperature, then the combined power is ............. $watt$

How much energy in kilowatt hour is consumed in operating ten $50\, watt$ bulbs for $10$ hours per day in a month ($30$ days).

The resistive network shown below is connected to a $D.C.$ source of $16\, V$. The power consumed by the network is $4\, Watt$. The value of $R$ is ............. $\Omega$