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WorksheetsTest2_1
Total questions: 20
Worksheet time: 17mins
Which copper wire has the lowest resistance?
1 meter of 1 mm diameter wire
0.5 meter of 1 mm diameter wire
0.5 meter of 0.5 mm diameter wire
1 meter of 0.5 mm diameter wire
The length of a certain conductor of resistance 100 is doubled and its cross-sectional area is halved. Its new resistance is
100
50
200
400
The unit to measure the resistivity of a wire is
ohms
Volt
ohms.m
ohms.s
24. A 20-m wire of 0.10 mm2 cross-sectional area draws 0.5 A when connected across a 3.0-V potential difference.
(a) What is the resistance of the wire?
(b) What is the resistivity of the material from which the wire is made?
(a) 1.5 Ω (b) 6.0 × 10-9 Ω • m
(a) 1.5 Ω (b) 3.0 × 10-8 Ω • m
(a) 6.0 Ω (b) 3.0 × 10-8 Ω • m
(a) 6.0 Ω (b) 6.0 × 10-9 Ω • m
The type of current where charges shake back and forth in a circuit
Alternating Current
Direct Current
Voltage
Switchback Current
_______________ is a component that stores electrical energy in an electric field. Like a battery
Oscillators
Resistor
Capacitors
A measurement taken from zero to the highest value obtained in either the positive or negative half of a sine wave would determine ? .
the effective voltage
the peak voltage
the peak to peak voltage
the average voltage
With reference to the image above, what is the relationship between the voltage and current?
They are 120 deg out-of-phase.
They are in-phase.
Voltage lags current.
Current lags voltage.
