What does temperature measure?
A) the average mass of particles in a substance
B) the average size of particles in a substance
C) the average kinetic energy of particles in a substance
D) the total number of particles in a substance
E) the total potential energy of particles in a substance
C) the average kinetic energy of particles in a substance
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Phase Angles: An series circuit consists of an ac voltage source, a resistor of resistance 810 ?, and an inductor. (There is no capacitance in the circuit.) The current amplitude is 0.40 A, and the phase angle between the source voltage and the current has magnitude 11°. (a) Does the source voltage lag or lead the current?(b) What is the voltage amplitude of the source?
What will be an ideal response?
A +5.0-µC point charge is 12 cm from a -5.0-µC point charge. What is the magnitude of the field they produce at the point on the line connecting them where their electric potential (relative to infinity) is zero?
(k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 0 N/C B) 12.5 MN/C C) 0.75 MN/C D) 25 MN/C E) 1.5 MN/C
If a 9.0-V battery, with negligible internal resistance, and an 27-W resistor are connected in series, what is the amount of electrical energy transformed to heat per coulomb of charge that flows through the circuit?
a. 0.50 J c. 3.0 J b. 9.0 J d. 72 J
What is the current in the 15-? resistor when ? = 9.0 V?
a.
0.20 A
b.
0.30 A
c.
0.10 A
d.
0.26 A
e.
0.60 A