practicequiz5b

practicequiz5b - Name: ________________________ Class:...

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Unformatted text preview: Name: ________________________ Class: ___________________ Date: __________ ID: A 1 Quiz 5 Direct current Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. If a 1.6 mm diameter aluminum wire has a current of 2.9 A and an electron density of 1.81 10 23 / cm 3 , the drift velocity of the conduction electrons is: 0.02 mm/s a. 0.02 mm/s b. 0.05 mm/s c. 0.90 mm/s d. 1.2 mm/s e. None of the above ____ 2. 0.510 mm diameter Nichrome wire (resistivity p = 10-6 -m) is used as a heater element. If 115 V is used, the length of the wire required for 1200 W heat is: a. 180 cm b. 225 cm c. 280 cm d. 310 cm e. None of the above ____ 3. The monitor display beam of a computer uses 0.24 mA. The number of electrons per second striking the screen is: a. 2.4 10 13 b. 8.2 10 13 c. 1.2 10 14 d. 1.5 10 15 e. None of the above ____ 4. A Discman (portable CD player) is powered by four 1.5-V AAA batteries in series. The operating voltage of the appliance is: a. 6.0 V b. 4.5 V c. 3.0 V d. 1.5 V e. None of the above ____ 5. A 1.5-V battery is rated at 15.0 amp-hours. The amount of charge it corresponds to: a. 36 kC b. 45 kC c. 51 kC d. 54 kC e. None of the above ____ 6. A 0.48 hp motor operates on a 120 V line. The current drawn by the motor is: a. 1.6 A b. 2.2 A c. 2.8 A d. 3.0 A e. None of the above Name: ________________________ ID: A 2 ____ 7. The maximum voltage that can be applied to a 500 resistor rated at 0.45 W is: a. 15 V b. 24 V c. 35 V d. 45 V e. None of the above ____ 8. A 1500 W room heater is used for 12 hours. At $0.085 per kilowatt-hour, the cost of operating the heater is: a. $3.24 b. $2.35 c. $1.53 d. $1.12 e. None of the above ____ 9. The positive terminal of a 9.0 V battery is connected to the positive terminal of a 1.5 V battery. The negative terminals of the two batteries are connected through a 10 ohm resistor. The current through the resistor terminals of the two batteries are connected through a 10 ohm resistor....
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This note was uploaded on 01/24/2010 for the course PHYS 1 taught by Professor Onuich during the Spring '07 term at CSU Northridge.

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practicequiz5b - Name: ________________________ Class:...

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