Question

An electric heater,rated 15 volts 40 watts fitted into a metal block supplies heat to the block of mass 1.5kg and specific heat capacity of 460. calculate the temperature rise of in the block if the current flows for 10 minutes

Answer 1

The temperature rises of in the block if the current flows for 10 minutes is, 34.78K.

To find the answer, we need to know about the power of the electric heater.

How to find the temperature rise of in the block if the current flows for 10 minutes?

• We have given with the variables,

                           $P=40 W\\m=1.5kg\\S=460\\t=10minutes=10*60s=600s$

• We have an expression the heat given to the system as,

                             $P*t= mS$ΔT

• We have to find the temperature rise ΔT,

                           ΔT $=\frac{P*t}{mS} =\frac{40*600}{1.5*460} =34.78K$

Thus, we can conclude that, the temperature rises in the block if the current flows for 10 minute is 34.78K.

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Answer 2

If the current flows for 10 minutes, the temperature in the block rises by 34.78 K.

We must understand the electric heater's power in order to determine the solution.

How can you determine the block's temperature increase if the current flows for ten minutes?

• With the variables that we have provided,

              $P=40Watts\\m=1.5kg\\s=460\\t=10 min=600s$

• The heat supplied to the system is referred to as,

                    $Pt=ms$ΔT

We must determine the increase in temperature, T.

             ΔT$=\frac{Pt}{ms} =34.78 K$

Thus, we can infer that if the current flows for 10 minutes at 34.78K, the temperature in the block will increase.

Learn more about the effectiveness of an electric heater here:

brainly.com/question/28050631

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