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Module
3.7b
Resistance /Resistor (1of3)
Ohms Law, Kirchoff's Voltage and Current Laws; Calculations using the above laws to find resistance, voltage and current; Significance of the internal resistance of a supply.
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An increase in operating temperature in most electrical devices carrying current results in.
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1 point
a decrease in resistance and an increase in current.
no effect on the resistance and current.
an increase in resistance and a decrease in current.
Copper is an inferior conductor to aluminium when comparing. (CSA=cross sectional area)
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1 point
CSA with CSA.
weight for weight.
load for load.
What happens to the resistance of a copper conductor when the temperature increases?.
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1 point
It decreases.
It increases.
It remains the same.
Carbon has a.
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1 point
temperature coefficient of zero.
positive temperature coefficient.
negative temperature coefficient.
The 5th coloured band on a resistor represents the.
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1 point
reliability or temperature coefficient.
tolerance.
multiplier.
If the temperature of a pure metal is reduced to absolute zero, its resistance will be.
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1 point
unaffected.
practically zero.
infinity.
If a resistor is too small or misshapen to fit the colour code bands, how else is it's value indicated?.
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1 point
Dots.
Number code.
Letter code.
Resistors required to carry a comparatively high current and dissipate high power are usually of.
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1 point
Wire wound metal type.
Carbon compound type.
Wire wound ceramic type.
The temperature of a pure metal can greatly affect the resistance of it. What temperature scale is used?.
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1 point
Absolute.
Centigrade.
Fahrenheit.
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