An arc lamp operates at 80V . suggest a method to use it with 240 V d.c. source

  1. 👍 0
  2. 👎 0
  3. 👁 135
  1. Connect a resistor in series with it.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    A boy of height 95 cm is walking away from base of a lamp post at a speed of 1.5 m/s.If the lamp post is 3.8 m above the ground, find the length of his shadow after 5 seconds.

  2. Astronomy

    When used at a wavelength of 1 micron, a telescope can resolve angles as small as 0.1 seconds of arc. How small an angle could the telescope resolve when used at a wavelength of 5 microns? a. 0.02 seconds of arc b. 0.004 seconds

  3. pre calcalus

    a circle with 4 inch radius, find length of arc when intercepted by central angle of 240 degrees

  4. math

    A man is 6ft tall is standing 10 feet from the base of a lamp post. The mans shadow has a lenght of 4ft . How tal is he lamp post

  1. English

    "I have but one lamp by which my feet are guided; and that is the lamp of experience." This is an example of a. an appeal to authority b. allusion c. conceit d. logic C? Thanks

  2. physics

    Because a concave lens cannot form a real image of a real object, it is difficult to measure its focal length precisely. One method uses a second, convex, lens to produce a virtual object for the concave lens. Under the proper

  3. apex geometry

    Hannah constructed two similar circles as seen in the image below. If the arc length of the larger circle is , which of the following would be true? A. The arc length of the smaller circle is proportional to the radius of the

  4. Cypress

    Suggest any limitations to the use of recrystallization as a purification method for a solid.

  1. physics

    An electrical source with internal reistance r is used to operate a lamp of resistance R. What fraction of the total power is delivered to the lamp?(a)R+r/R(b)R-r/R (c)R/R+r (d)R/r

  2. math

    A woman 5 ft tall is standing near a street lamp that is 12 ft tall. Find a function that models the length L of her shadow in terms of her distance d from the base of the lamp.

  3. calculus

    A person 150cm tall is walking away from a lamp post at the rate of 15 meter per minute. when the man is 2.5m from the lamp post, his shadow is 3m long. Find the rate at which the length of the shadow is increasing when he is 7m

  4. calc

    a man 6 feet tall is walking away from a lamp post at the rate of 60 feet per minute. when the person is 6 feet from the lamp post, his shadow is 12 feet long. find the rate at which the length of his shadow is increasing when he

You can view more similar questions or ask a new question.