Physical science

1. Which of the following frequencies falls in the range of RF wavws used by commerical radio broadcasting stations
a. .60 HZ
b. 6,00 HZ
c. 600.00 HZ
d. 6,000,000 HZ

2. In a cathrode ray tube, the number of electrons that reach the fluorescent screen is controlled by the
a. anode
b. cathrode
c. deflecting plate
d. grid

3. The function of a capacitor in an electric circuit is to
a. allow current flow between it plates
b. measure the amount of curent in the curcuit
c. increase circuit power
d. store electric changes

4.To use your left hand to determine the direction of the voltage developed in a moving conductor in a stationary magnectic field, you must point your
a. thumb in the direction of the magnetic flux
b. thumb in the direction of the electromagnectic force
c. forefinger in the direction of the lines of force
d. forefinger in the direction of the motion


I will be happy to critique your thinking on these. All have a straighforward answer. On number two, remember what the grid in any vacumn tube does.


1. Read the site I have provided, but beware of the difference between HZ KHZ and MHZ and choose your answer:
http://www.wisegeek.com/what-is-rf.htm


3. go to the following link:
http://en.wikipedia.org/wiki/Capacitor

2. Yopur exact answer is here:

http://66.102.7.104/search?q=cache:Nr8mP1Y9wa0J:wps.aw.com/wps/media/objects/877/898586/topics/topic07.pdf+%22cathode+ray+tube%22+%22number+of+electrons%22+%22fluorescent+screen%22+anode+plate+grid&hl=en&gl=us&ct=clnk&cd=1




1. Read the site I have provided, but beware of the difference between HZ KHZ and MHZ and choose your answer:
http://www.wisegeek.com/what-is-rf.htm


3. go to the following link:
http://en.wikipedia.org/wiki/Capacitor

2. Yopur exact answer is here:

http://66.102.7.104/search?q=cache:Nr8mP1Y9wa0J:wps.aw.com/wps/media/objects/877/898586/topics/topic07.pdf+%22cathode+ray+tube%22+%22number+of+electrons%22+%22fluorescent+screen%22+anode+plate+grid&hl=en&gl=us&ct=clnk&cd=1

  1. 👍 0
  2. 👎 0
  3. 👁 78
asked by Mary

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science 4th Grade

    Bats and dolphins both hear a ______ than humans do... a.smaller range of pitches b.smaller range of frequencies c.larger range of resonances d.larger range of pitches and frequencies

    asked by Visitor on April 8, 2012
  2. Physics

    AM radio signals are broadcast at frequencies between 540 kHz and 1585 kHz (kilohertz) and travel 3.0 X 10^8 m/s. a. What is the range of the wavelengths for the signals? (from shortest to longest). b. FM frequencies range between

    asked by kara on March 6, 2012
  3. algebra

    A typical acoustic guitar has a range of three octaves. When the guitar is tuned to “concert pitch,” the range of frequencies for those three octaves is between 82.4 Hz and 659.2 Hz inclusive. Write a compound inequality to

    asked by josh on September 4, 2016
  4. physics

    The AM frequencies of a radio dial range from 550 kHz, and the FM frequencies range of 88.0 MHz to MHz. all of these radio waves travel at a speed of 3.0x10^8 m/s, what are the wavelenght ranges of a.) the aM brand b.) FM brand

    asked by Jane on November 14, 2015
  5. physics

    The AM frequencies of a radio dial range from 550 kHz, and the FM frequencies range of 88.0 MHz to MHz. all of these radio waves travel at a speed of 3.0x10^8 m/s, what are the wavelenght ranges of a.) the aM brand b.) FM brand

    asked by Anonymous on November 14, 2015
  6. Alg

    AM frequencies of radio transmissions range from 535-1705 kilohertz. Assume they are an exponential function. Write an equation for the AM frequencies along a display that is 15 cm long.

    asked by Anonymous on May 25, 2010
  7. physics

    1.)A radio station transmits waves of length 400m.if the speed of the waves is 3*10power8m/sec,find the frequency of the radio station. 2.)Audible range of frequencies is between 20Hz and 20KHz.Find the range of the wavelengths

    asked by srikar on May 18, 2012
  8. physics

    what is audible range of frequencies of sound in humans?calculate the corresponding range of audible wavelengths.

    asked by naila on February 28, 2012
  9. physics

    what is audible range of frequencies of sound in humans?calculate the corresponding range of audible wavelengths.

    asked by naila on February 28, 2012
  10. Physics (Waves)

    You have 27 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time, depending on how the

    asked by M on April 20, 2012

More Similar Questions