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Resistance and Power
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If a calculator display was "0.00263," what would this answer be in percent
0.026%
2.63%
0.26%
26.3%
The unit designator for resistance value is the
watt
ohm
volt
Ampere
Power is measured in units of
joules x charge
joules/time
joules/work
joules x voltage
A color code of orange, orange, orange is for what ohmic value
44000 ohms
33 kilohms
22 kilohms
3300 ohms
With 1 mA of current, what wattage rating should a 470 ohm resistor have
2 watts
1/4 watt
1/2 watt
1 watt
The load resistanceincreases.
How will the load current change
Increase
Remain constant
vary
Decrease
Wirewound resistors are usually used in circuits that have
high current
negative temperature coefficients
high voltage
low power
One ampere of current flowing through one ohm of resistance is equal to
1 watt
1 Btu
1 horsepower
1 joule
A good fuse will have
a high resistance
zero ohms resistance
an infinite resistance
a medium resistance
Resistance in a circuit is
the same as current
opposition to current
the same as voltage
opposition to voltage
Resistors are identified as to wattage by
internal construction
color code
types of materials
size
How is power dissipated in a resistor
by voltage
by resistance
by current
by heat
Which type of test equipment is used to measure resistors
Ohmmeter
watt meter
Voltmeter
Ammeter
If resistance decreases, then current will
Decrease
Remain the same
Increase
double
With a complex circuit, a supply source senses
only a single resistive connection
when voltages need to be increased
when complex currents are needed
open circuit components
A potentiometer has how many leads
1
2
4
3
A 33 k resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings
6600 ohms
24183 ohms
26400 ohms
39970 ohms
With Ohm's law, no change in resistance means that current and voltage will be
inversely proportional
Directly proportional
The same
unable to produce energy
What happens to current and resistance if the voltage doubles
Current remains the same and resistance doubles.
Current doubles and resistance doubles.
Current doubles and resistance is halved.
Current doubles and resistance remains the same.
Electrical equipment is protected against excessive current by a(n)
circuit opener
metal ended coil
insulated glass container
fusible wire link
1
2
4
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