Worksheets10-A2
Total questions: 10
Worksheet time: 10mins
The resistance of a wire is R. If the wire were 3 times of the initial Lenght and its radius were half of the initial radius what would be its resistance?
20
15
9
10
12
Calculate the Lenght of a copper wire having a cross section 4×10−8 m2 and a resistance of 10 Ω. ( The resistivity of copper is 8×10−7 Ω m2 )
0.12
0.15
0.5
0.10
0.8
What is the unit of measurement for resistance?
Voltage
Ampere
Watts
Ohms
What happens to resistance when the length of the wire increases?
Stays the same
Increases
Decreases
What effect does a hotter temperature have on resistance?
No effect
Increases resistance
Decreases resistance
Stays the same
A resistor's first three color bands are brown, black, and red. What is its value?
10 ohms
10K ohms
200 ohms
1000 ohms
A 47K ohm resistor would have which colors on its first three bands?
Yellow, Violet, White
Yellow, Violet, Orange
Red, White, Blue
Orange, Yellow, Violet
Which of these colors is NOT used in the resistor value color code?
White
Black
Violet
Pink
The gold color band refers to__________tolerance.
+ / - 20%
+ / - 10%
+ / - 5%
zero
