Two isolated copper plates, each of area 0.40 m2, carry opposite charges of magnitude 7.08 × 10-10 C. They are placed opposite each other in parallel alignment, with a spacing of 4.0 cm between them
What is the potential difference between the plates? (?0 = 8.85 × 10-12 C2/N ? m2 )
A) 8.0 V B) 0.40 V C) 3.0 V D) 7.6 V E) 3.2 V
A
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Indicate whether the statement is true or false
How might one connect four 10. volt batteries to create one equivalent battery having a potential of 20. volts?
What will be an ideal response?
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
Which has the greatest effect on the flow of fluid through a pipe? That is, if you made a 10% change in each of the quantities below, which would cause the greatest change in the flow rate?
A) the fluid viscosity B) the length of the pipe C) the pressure difference D) the radius of the pipe E) the fluid density