Question

calculate the heat developed in a conductor in two minutes if the device of resistance 600ohm working under 220volt ​

Answer 1

Answer:

Explanation:

ANSWER:-

To attempt this question, we need to remember the following formula;

$\boxed{\underbrace{\sf{H}}_{\sf{Heat}}= \underbrace{\sf{I^{2}}}_{\sf{Current}}\times \underbrace{\sf{R}}_{\sf{Resistance}}\times \underbrace{\sf{T}}_{\sf{Time}}}$

Now, we can easily find it out.

• Times = 2 minutes = 120 seconds
• Resistance = 600 ohm
• Voltage = 220 Volts
• Heat = ?

We also need Current in this case.

The formula for finding current with respect to voltage and Resistance is :-

$\sf{{\underbrace{V}_{Voltage}}= \frac{\underbrace{I}_{Current}}{\underbrace{R}_{Resistance}}}$

So , finding current:-

$\sf{220}=\sf{I}\times\sf{600}\\\sf{I}= \frac{\SF{220}}{\sf{600}}$

= 0.36 Amperes.

So,

Heat = 0.36*600*120*0.36 (Current is squared)

= 9331.2 Joules of Heat is released.

Things to Remember:-

• Always , when attempting this question,
• Maintain that the units are in SI units
• SI units are there in the follows:
• SI Unit of Current is Ampere
• SI unit of Heat is Joule
• SI unit of Voltage is Volts
• SI unit of time is second
• These need to be converted before attempting the question.