1b_final solutions

1b_final solutions - Name: ________________________ Class:

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Name: ________________________ Class: ___________________ Date: __________ ID: A 1 final exam Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. c (water) = 4.2 J/g, L f (water) = 334 J/g, L v (water) =2260 J/g ,4.2 J=1 cal, R= 8.3 J/Kmol o = 8.9 x10-12 C 2 /N m 2 , k o = 9.0x10 9 Nm 2 /C 2 , e =1.6x10-19 C, = 4 x10-7 Tm/A ____ 1. A transmission line for carrying power has a certain resistance R. The power can be carried at either a voltage of 100 V or 3000 V. The power loss in the power line at 3000 V is ____________ than at 100 V. a. 30 times less b. 900 times less c. 30 times more d. 900 times more e. none of the above ____ 2. A metal bar moves at 2.4 m/s on two conducting parallel tracks 40 cm apart, as shown. The tracks have a negligible resistance and the bar has a resistance of 0.125 /cm. If there is a magnetic field of 0.50 T, current in the wire is _______. a. 0.05 A b. 0.1 A c. 0.4 A d. 1,2 A e. None of the above ____ 3. An inductor of 65 mH and a 0.25 resistance is suddenly connected to a 1.5 V battery. How much energy does the inductor store after 1.0 s. a. 0.30 J b. 0.60 J c. 1.2 J d. 2.4 J e. None of the above ____ 4. A transformer has 150 mA peak current in a 120 turn primary winding. The peak current induced in the 180 turn secondary winding is: a. 100 mA b. 120 mA c. 180 mA d. 225 mA e. None of the above Name: ________________________ ID: A 2 ____ 5. A 115 V ac electric motor has an ac resistance of 33 and an inductive reactance of 48 under full load. The peak current drawn is: a. 1.2 A b. 1.8 A c. 2.4 A d. 2.8 A e. None of the above ____ 6. Three capacitors, 6.0 F each, are connected in parallel to the terminals of an AC generator that delivers 84 V (peak value) at 250 Hz. The net rms current in the circuit is: a. 0.27 A b. 0.58A c. 2.5A d. 1.7A e. None of the above ____ 7. A series LCR circuit connected to a power source with rms voltage of 120 V has a resistance of 60 and an impedance of 100 . The average power dissipated in the circuit is: a. 45 W b. 52 W c. 73 W d. 86 W e. None of the above ____ 8. A nonideal inductance coil with an inductance of 275 mH and a resistance of 4.0 is connected in series with a capacitor to a 320 Hz, 120 V AC power source. What should be he value of the capacitor such that the current and the voltage are in phase? a. 0.90 F b. 3.25 F c. 8.44 F d. 1.3 mF e. None of the above ____ 9. In a series LRC circuit driven by an ac voltage source, when the magnetic field in the inductor is maximum the electric field in the capacitor is _______ and the voltage across the resistor is________. a. maximum, maximum b. maximum, zero c. zero, maximum d. zero, zero e. none of the above ____ 10. A loop containing 100 turns of wire with an area of 10 cm 2 is rotating in a field of 0.2 Tesla. If the rms voltage is 12 V the loop is rotating with a frequency of ________....
View Full Document

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.

Page1 / 15

1b_final solutions - Name: ________________________ Class:

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online