Current: If a quantity you calculated has units of A ? s, what is that quantity?
A. potential
B. resistivity
C. resistance
D. capacitance
E. charge
Answer: E
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LR Circuits: A 45-mH inductor is connected in series with a 60-? resistor through an ideal 15-V dc power supply and an open switch. What is the current 7.0 ms after closing the switch?
A. 250 mA B. 650 mA C. 550 mA D. 280 mA E. 850 mA
The power rating of a 400 ? resistor is 0.25 W. What is the maximum voltage?
A) 10 V B) 20 V C) 30 V D) 40 V E) 50 V
What can we infer, at least roughly, from a star's luminosity class?
A) its age in years B) its surface temperature C) its size (radius) D) its mass
The gravitational force exerted on a particle outside a sphere with a spherically symmetric mass distribution is the same as if the entire mass of the sphere was concentrated at its center
Indicate whether the statement is true or false