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CIE-10 Quiz 4
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1: A simple series circuit
has many paths for current flow
has a single path for current flow
has no paths for current flow
must have at least four elements
2: One element that was omitted from the series circuit on the top of lecture 5 is a
capacitor
resistor
fuse
battery
3: In a series circuit
current flow is everywhere equal
current flow is different in each branch
current is measured in parallel with each element
you must have at least one light bulb
4: The total resistance in a series string of resistora
can be calculated by the "product over the sum" formula
can be calculated by the reciprocal of the reciprocals formula
is less than the value of any one resistor in the string
is the sum of all the resistors
5: A 15 watt automobile (12 volt) bulb draws about how much current ?
0.8 amps
1.25 amps
600 mA
2.5 amps
6: A series string of resistors
cannot exceed three resistors
must have more than two resistors
can have a limitless number of resistors
must equal twice the battery voltage
7: In a series string of resistors, the sum of the voltage drop across each resistor must
be 12 volts
equal the current in the string
equal the value of the resistors
equal the battery voltage
8: In the circuit on the bottom of page 2 of Lecture 5 -- R1=10, R2=20, and R3=30. E =15 volts. The voltage across R2 is
5 volts
7.5 volts
10 volts
15 volts
9: Color code for a 4.7k ohm 5% resistor
yel-vio-brn-gld
yel-vio-org-gld
yel-vio-red-gld
yel-vio-blk-gld
10: Lab 05 Step 3 Calculated current?
11.3 amps
8.82 mA
882 mA
1.13 mA
11: E=9 volts. R=1.2k ohm. Power?
15 W
150 mW
68 mW
133 mW
12: In a simple parallel circuit
you are limited to four resistors
you can have limitless resistors
the equivalent resistance is the sum of the resistor values
removing one of the parallel resistors affects the current in the remaining resistors
13: The parallel equivalent of a 1k ohm and 2.2k ohm resistor is
680 ohms
3.2k ohms
220 ohms
4.4k ohms
14: How many ways are there to calculate equivalent parallel resistance
1
2
3
4
15: A spreadsheet allows for four parallel resistors. If you are only using three resistors, make the value of the missing resistor
zero
equal to the parallel equivalent of the other three
equal to the series equivalent of the other three
very large
16: Color code for a 680 ohm 5% resistor
blu-gry-blk-gld
blu-gry-brn-gld
grn-blu-brn-gld
blu-gry-red-gld
17: Calculated current with a 7.2 volt battery and 330 ohm resistor
46 mA
2.2 mA
22 mA
160 mA
18: Current with a 7.2 volt battery and a 330 ohm resistor in parallel with a 680 ohm resistor
32 mA
222 mA
22 mA
87 mA
19: The general scheme for analyzing a series-parallel circuit is
combine the series in parallel with the series
combine the series and the parallel and use the product-sum formula
to use the sums of the square roots of the resistor values
a continuous process that leaves a single equivalent resistor across the battery
20: A Wheatstone bridge is
A way of getting across the Truckee River
a resistive balance with a voltmeter detector
a very poor accuracy instrument
not useful for finding resistor values
21: One probable reason for an error in measuring the voltage of a resistive divider
Resistor color code may be wrong
a computer calculation error
the resistors in the divider may be too low in values
is the loading effect of the multimeter
22: A thermistor may be used to measure
light
temperature
voltage
current
23: An Excel spreadsheet
is known to have several calculation errors
cannot be used to calculate parallel equivalent circuits
may be used to generate a graph
is a poor tool for complex calculations
24: When first turned on, an incandescent light bulb
has a constant current at all times
draws a low current until it warms up
is a constant voltage device
draws a large current until it warms up
25: Excel Spreadsheet: Power in cell B7. Resistance in cell C4. Voltage calculation is done by
=sqrt(B7*C4)
=(B7^2)/C4
=(C4^2)/B7
=B7*C4
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