If we double the resistance in a circuit but keep the current in it constant, the power dissipated by that circuit will
A) be four times as great.
B) be two times as great.
C) be one-half as great.
D) be one-fourth as great.
B
You might also like to view...
A charged particle (m = 2.0 g, q = ?50 ?C) moves in a region of uniform field along a helical path (radius = 4.0 cm, pitch = 8.0 cm) as shown. What is the angle between the velocity of the particle and the magnetic field?
A. 27° B. 72° C. 63° D. 18° E. 58°
A helium-neon laser emits red light having a wavelength of 6.4 × 10^?7 m and a power of 0.5 mW. How many photons are emitted each second?
a. 6.4 × 10^38 b. 1.6 × 10^21 c. 3.2 × 10^25 d. 2.6 × 10^18 e. 1.6 × 10^15
In Europe, the combined Mississippian and Pennsylvanian periods are known as the
a. Carboniferous. b. Devonian. c. Pliocene. d. Tertiary.
Fission fragments tend to be radioactive because they have
A) more protons than neutrons. B) more neutrons than protons. C) too many more protons than neutrons. D) too many more neutrons than protons. E) the same number of neutrons as protons.