A 10-V-emf battery is connected in series with the following: a 2-F capacitor, a 2- resistor, an ammeter, and a switch, initially open; a voltmeter is connected in parallel across the capacitor. After the switch has been closed for a relatively long period (several seconds, say), what are the current and capacitor voltage readings, respectively?
a.
zero A, 10 V
b.
zero A, zero V
c.
5 A, zero V
d.
5 A, 10 V
[Ques. 2] A 10-V-emf battery is connected in series with the following: a 2-F capacitor, a 2.0- resistor, an ammeter, and a switch, initially open; a voltmeter is connected in parallel across the capacitor. At the instant the switch is closed, what are the current and capacitor voltage readings, respectively?
a.
zero A, 10 V
b.
zero A, zero V
c.
5 A, zero V
d.
5 A, 10 V
[Ques. 3] The basic function of a carburetor of an automobile is to atomize the gasoline and mix it with air to promote rapid combustion. As an example, assume that 30 cm3 of gasoline is atomized into N spherical droplets, each with a radius of 2.0 105 m. What is the total surface area of these N spherical droplets?
[Ques. 4] What is the mass of air in a room that measures 5.0 m 8.0 m 3.0 m? (The density of air is 1/800 that of water).
[Ques. 5] A 2.00 m by 3.00 m plate of aluminum has a mass of 324 kg. What is the thickness of the plate? (The density of aluminum is 2.70 103 kg/m3.)
[Ques. 6] The standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is the density of the material?
[Ques. 7] A rectangle has a length of 1.323 m and a width of 4.16 m. Using significant figure rules, what is the area of this rectangle?
a. 5.50368 m2
b. 5.5037 m2
c. 5.504 m2
d. 5.50 m2
e. 5.5 m2
[Ques. 8] Consider the circuit shown in the figure. What power is dissipated by the entire circuit?
a.
14 W
b.
28 W
c.
52 W
d.
110 W
[Ques. 9] One number has three significant figures and another number has four significant figures. If these numbers are added, subtracted, multiplied, or divided, which operation can produce the greatest number of significant figures?
a. the addition
b. the subtraction
c. the multiplication
d. the division
e. All the operations result in the same number of significant figures.
[Ques. 10] If = 20 V, at what rate is thermal energy being generated in the 20- resistor?
a.
6.5 W
b.
1.6 W
c.
15 W
d.
26 W
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