Project #24265 - My quiz

# 1

A standard flashlight battery can deliver about 1.4 W·h of energy before it runs down. (a) If a battery costs 80 cents, what is the cost in dollars of operating a 100 W lamp for 6.5 h using batteries? (b) What is the cost in dollars if power is provided at the rate of 6.0 cents per kilowatt-hour?

#2

When resistors 1 and 2 are connected in series, the equivalent resistance is 13.2 Ω. When they are connected in parallel, the equivalent resistance is 2.26 Ω. What are (a) the smaller resistance and (b) the larger resistance of these two resistors?

#3

In an RC series circuit, ε = 12.0 V, R = 1.35 MΩ, and C = 1.50 µF. (a) Calculate the time constant. (b) Find the maximum charge that will appear on the capacitor during charging. (c) How long does it take for the charge to build up to 6.80 µC?

#4

A capacitor with initial charge q0 is discharged through a resistor. What multiple of the time constant τ gives the time the capacitor takes to lose (a) the first 1/7-th of its charge and (b)6/7-th of its charge?

 

 

Subject Science
Due By (Pacific Time) 03/03/2014 07:00 am
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