NEW
Font size
WorksheetsResistors
Total questions: 10
Worksheet time: 6mins
A resistor's first three colour bands are brown, black, and red. What is its value?
10 ohms
10 Kohms
200 ohms
1000 ohms
A 47 Kohm resistor would have which colours on its first three bands?
yellow, violet, white
red, white, blue
yellow, violet, orange
orange, yellow, violet
The unit to measure the resistivity of a wire is
ohms
Volt
ohms.m
ohms.s
The total current through this circuit is
0.02 amps
0.09 amps
50 amps
9 amps
As the resistance of a circuit increases, the current will...
increase
decrease
stay the same
What is the purpose of a resistor?
allow current flow
control current flow
prevent current flow
allow heat to build up
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
