Reactance: A simple ac circuit is composed of a capacitor connected across the terminals of an ac power source. If the frequency of the source is doubled, what happens to the reactance of the capacitor?

A. It increases by a factor of 4.
B. It increases by a factor of 2.
C. It increases by a factor of .
D. It decreases by a factor of 2.
E. It decreases by a factor of 4.


Answer: D

Physics & Space Science

You might also like to view...

In a nova, there is a white dwarf, an evolving companion star, and a(n) ________ surrounding the white dwarf's equator

Fill in the blank(s) with correct word

Physics & Space Science

In order of decreasing frequency, which of the following is correct?

a. infrared, visible, ultraviolet, and gamma b. gamma, ultraviolet, visible, and infrared c. visible, radio, ultraviolet, and X-ray d. visible, gamma, ultraviolet, and X-ray

Physics & Space Science

Which of the following best describes the origin of ocean tides on Earth?

A) Tides are caused by the difference in the force of gravity exerted by the Moon across the sphere of the earth. B) The Moon's gravity pulls harder on water than on land, because water is less dense than rock. C) Tides are caused by the 23 1/2° tilt of the earth's rotational axis to the ecliptic plane. D) Tides are caused primarily by the gravitational force of the Sun. E) Tides are caused on the side of Earth nearest the Moon because the Moon's gravity attracts the water.

Physics & Space Science

A wheel rotates about a fixed axis with a constant angular acceleration of 4.0 rad/s2 . The diameter of the wheel is 40 cm. What is the linear speed of a point on the rim of this wheel at an instant when that point has a total linear acceleration with a magnitude of 1.2 m/s2?

a. 39 cm/s b. 42 cm/s c. 45 cm/s d. 35 cm/s e. 53 cm/s

Physics & Space Science