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CIE-10 Quiz 5
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1: When measuring voltage and current in a component, the voltmeter goes in _____ and the ammeter goes in _____ with the component.
parallel, parallel
series, series
parallel, series
series, parallel
2: A two-resistor parallel circuit may be replaced by a single resistor given by the equation
sum divided by the product
product divided by the sum
product divided by the product
sum divided by the sum
3: A Wheatstone bridge
uses an ohmmeter to measure unknown resistances
Is on highway 267 across the Little Truckee River
does not require any power source
uses a system of balanced resistors to measure an unknown resistor
4: In high-resistance circuits (megohms)
the meter resistance may cause large errors when measuring voltage
using a low impedance ammeter gives accurate results
using a low-impedance voltmeter gives the most accurate results
using an ohmmeter will give us the correct voltage
5: Cadmium sulphide
is very expensive
makes an excellent high-precision resistor
is photosensitive
is an excellent insulator
6: When you first turn on an incandescent light bulb
It slowly comes up to temperature
the instantaneous current is very high
the current slowly comes up to the final value
the current controls the voltage
7: Electricity generated chemically
is generally DC
is generally AC
uses two identical metals
generally uses water as the electrolyte
8: A battery
does not need an electrolyte
uses two identical metals
delivers AC to the load
can be made by several cells in series
9: "Galvanized" means
supplied with voltage
plated with zinc
used for heavy current flow
twisted together
10: A good example of a primary cell is
an automobile battery
a flashlight battery
a rechargeable cell phone battery
a rechargeable laptop battery
11: A flashlight battery can leak
if the zinc jacket has holes
if the carbon electrode is eaten away
if the outer cardboard jacket is intact
if the chloride pastes are contained
12: An automobile battery uses
hydrochloric acid
nitric acid
sulphuric acid
muriatic acid
13: An automobile battery is
a primary cell
a secondary cell
a constant current device
a relatively low power device
14: The primary metal in an automobile battery is
mercury
cadmium
lithium
lead
15: Nicad batteries
have an infinite shelf life
are primary cells
are bad for the environment
use niobium as one of the plates
16: A 1.5 volt "D" flashlight cell is rated at 15,000 mAh. How long will it light a 1/2 watt flashlight bulb?
about 2 hours
about 4.5 hours
about 45 hours
about 450 hours
17: Ferrite magnets have as one component
rust
lithium
cadmium
sulphur
18: A "supermagnet" is made from
silicon, germanium, and gallium arsenide
aluminum, nickel, copper, and steel
strontium, barium, and iron oxide
neodymium, iron, and boron
19: Magnets can produce electricity
but not very well
and electricity can produce magnets
which is primarily DC
for a short while
20: Most commercial electricity is made by
mechanically pushing magnets into and out of coils
photoelectric cells
rotating motors or turbines
wind power
21: Photoelectric power generation
uses free sunlight, so it is cheap
requires many years to reach "break even" on investment
provides 110 volt AC power directly
has zero uses in today's world
22: Using the oscilloscope "normally", the y axis is calibrated in _____ and the x axis is calibrated in _____.
voltage, time
time, voltage
resistance, voltage
voltage, current
23: Use the sine wave picture on the top of page 2 of Lecture09. If the time/div switch is set to 500 microseconds/division, this waveform has a frequency of
2 kHz.
1 kHz
4 kHz
500 Hz.
24: Same waveform. Vertical calibration is 0.5 volts/div. What is the RMS voltage value of this waveform.
about half a volt
about a volt
about 1.5 volts
about 3 volts
25: The oscilloscope time base moves the beam
up to down
down to up
left to right
right to left
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