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Category > Physics Posted 20 Apr 2017 My Price 8.00

The electric field

1. The electric field necessary to ionize dry air and produce a spark is about 33 kiloVolts/cm. If you rub your feet along a carpeted floor and can produce a spark by touching someone that is 1.0 mm long, what was the voltage generated?

3300 V

33,000 V

330 V

33.0 V

3.30 V

 

2. A transverse wave is traveling along a wire. As the tension increases, the speed of the wave

decreases

increases

stays the same

disappears

changes randomly

 

3. A 12 V battery is connected to a device that has a resistance of 10 ohms. What is the current drawn by the device?

12 amps

120 amps

1.2 amps

0.12 amps

0.012 amps

 

4. A wave with a frequency of 1000 Hz and wavelength of 0.34 m has a speed of

0.00034 m/s

34.0 m/s

340 m/s

2941 m/s

0.0 m/s

 

5. A standing wave on a string with 4 antinodes has how many nodes?

8

7

6

5

4

Answers

SuperTutor
(15)
Status NEW Posted 20 Apr 2017 12:04 AM My Price 8.00

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