Question

1) At what frequency is the reactance of a 4.50-μF capacitor equal to 3.50 kΩ?

_____ Hz

2) The speed of light in a semi-precious stone is 2.09 × 10⁸ m/s. What is the index of refraction of the semi-precious stone?

numeric response _____

3) What is the speed of light in a precious stone that has an index of refraction of 2.0490?

____m/s

4) Fernando detects the electric field from an isotropic source that is 19.3 km away by tuning in an electric field with an rms amplitude of 48.2 mV/m. What is the average power of the source?

____kW

5) A police car is moving at 41.3 m/s to catch up with a speeder directly ahead. The speed limit is 29.1 m/s. A police car radar “clocks” the speed of the other car by emitting microwaves with frequency 6.20 × 10¹⁰ Hz and observing the frequency of the reflected wave. The reflected wave, when combined with the outgoing wave, produces beats at a rate of 1400 s⁻¹. If the speeder is going faster than the police car, how fast would it have to go so that the reflected microwaves produce the same number of beats per second?

____m/s

6) What is the wavelength of the radio waves broadcast by an FM radio station with a frequency of 90 MHz?

____m

Answer 1

Avg Power is given by Average intensity×Area

0 Reactance, Xe = d. Wc wa 103 15.75 =) W= I Хос 3.58103 x 4.5X106 63,49 =) W = 63.79 AS W=21f = 63.49 10.11 Hz AS » f- 63.49 ZT M= speed of light in vaccum speed of light in medium 11.435 Gin M= 3x108 2.09X108 And M= v=c u 3x108 2.049 1.464 X 108 mis Aug. Inersity = Aug. Power Area =) Aug. Power Aug. Intensity & Area ny 440² 1 c to E² x 78? = 3*3% 10% 5.85 800 m (48.2X16*}} x 471 X (19.3x103)? 288577761 X 16"x10-6 X 100 28857.7761 watt Aug. Power Aus 08 28-857 kw sst kulang

Where A is area of sphere .