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Q. 59

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 903

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Short Answer

A cube of water 10 cm on a side is placed in a microwave beam having . The microwaves illuminate one face of the cube, and the water absorbs of the incident energy. How long will it take to raise the water temperature by . Assume that the water has no heat loss during this time.

The raise of the water temperature is

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Step by Step Solution

Step 1: Definition of Electromagnetic fields and Waves:

A charge near its surroundings produces an electric field, which is a force. When other charges are brought near this field, they are subjected to this force. N/C (Force/Charge) is the SI unit for electric fields.

Step 2: Given values:

Step 3: Substitute the rate of energy values into equation:

Step 4: Equation:

Now, Find value for :

Step 5: Substitute the values in equation: 

Finally, find the values for :

Step 6: Final Result:

The change in the quantity of water is .

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