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PHSC1100- Quiz 8

vburke59696 12 questions Updated 19 Feb 2016

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Questions in this quiz (12)

  1. 1The magnetic field of a bar magnet is similar to that produced by
    1. Aa horseshoe magnet
    2. Ba straight current carrying wire
    3. Ctwo coils separated by long distance
    4. Da current carrying solenoid
  2. 2Alternating current has an advantage over direct current because
    1. Abatteries can be displaced in most circuits
    2. Belectrical generators can be made
    3. Cproduces no heat loss
    4. Done can step up, or down, the voltage used
  3. 3A transformer (adaptor) can only operate if
    1. Athe power in equals the power out
    2. Bthe potential difference is large enough
    3. Cwe step up the voltage
    4. Dan alternating current is used
  4. 4What transformer-turns ratio of secondary to primary is required to lower the voltage of a 120 V wall socket to 9 V for charging a cell phone?
    1. A13
    2. B0.025
    3. C0.035
    4. D0.075
  5. 5If the current through a 27 ohm resistor and a 13 ohm resistor in series is 3 A, then the total voltage drop across both of these resistors will be
    1. A15 V
    2. B20 V
    3. C60 V
    4. D120 V
  6. 6A bird sitting on a bare high voltage wire is not electrocuted because ____
    1. Aof the high resistance of its body
    2. Bits body is at a low electrical potential compared to the wire
    3. Cthe high voltage across its feet produced a small current
    4. Dthere is no electrical potential difference across its body because the other wire is out of reach
  7. 7For a photovoltaic cell of 0.5 V and area of 1 cm2 the maximum power output is 120 mW (mW= 10^-3 W), what is the current provided by this cell?
    1. A0.01 A
    2. B0.02 A
    3. C0.024 A
    4. D1.0 A
  8. 8The site location for a wind turbine is especially important. If the power output goes as the cube of the wind velocity, then which of the following average velocities will give approximately 6 times as much output as 10 mph winds?
    1. A15 mph
    2. B10 mph
    3. C18 mph
    4. D20 mph
  9. 9If the average wind speed for 24 hours is 15 mph at one site but 10 mph at another site for 12 hours and then 20 mph for 12 hours at another site, how much output can be expected from the first turbine compared to the turbine at the second site?
    1. A1/2
    2. B1/4
    3. C1/8
    4. D3/4
  10. 10A 90 ohm resistor is connected across 120 V. How much heat (in W) is dissipated in the resistor?
    1. A0.5 W
    2. B0.7 W
    3. C120 W
    4. D160 W

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Description
Quiz on PHSC1100- Quiz 8, created by vburke59696 on 10/12/2014.
Language
English
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7
History
Created on 10 Dec 2014 · updated on 19 Feb 2016
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