For a microwave unit, the power output of microwaves is 1.00 kW. It projects ont
ID: 2245927 • Letter: F
Question
For a microwave unit, the power output of microwaves is 1.00 kW. It projects onto an area of .12 m^2.
1. Calculate the average intensity of this output in kilowatts per meter squared. (kW/m^2)
a)0.100 b)8.33 c)7.25 d)1.67 e)0.932
2. Calculate the field amplitude in kilo-volts per meter. (kV/m).
a)2.51 b)6.32 c).217 d)0.394 e) 8.99
3. Calculate the magnetic field amplitude in micro Tesla.
a)0.51 b)6.32 c) 1.25 d)9.33 e)4.75
4. During normal beating, the heart creates a maximum 4.00 mV potential across 0.300m of a persons chest, creating a 1.00 Hz electromagnetic wave. What is the maximum electric field strength created in milli-volts per meter.
a)8.40 b)4.21 c)13.3 d)14.2 e)0.575
5. What is the wavelength of the electromagnetic wave?
a)0.51 m b)13nm c)45.2 mm d) 18.8 um e)3.00x10^8 m
6. If you wish to detect details regarding the size of the atom, which is about 1x10^-10m, it must have a wavelength of this size. What would be the corresponding frequency and what type of electromagnetic radiation would this be?
a) 3x10^18 Hz, microwaves b)3x10^18 Hz, x-rays
Explanation / Answer
(problems 1-3) For a microwave unit, the power output of microwaves is 1.00 kW. It projects onto an area of 0.12 m2.
1. 1. Calculate the average intensity of this output in kilo-watts per meter squared (kW/m2).
a. 0.100 b. 8.33 c. 7.25 d. 1.67 e. 0.932
answer : b. 8.33
2. 2. Calculate the field amplitude in kilo-volts per meter (kV/m).
a. 2.51 b. 6.32 c. 0.217 d. 0.394 e. 8.99
answer : A.2.51
3. 3. Calculate the magnetic field amplitude in micro Tesla (
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