INSTRUCTION
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Subject: Basic EE – Activity 2
Filename: Full name (SN, GN, MI) in pdf
Date of Submission: August 28, 2025 at 8:30pm
Solve the following problems.
1. Compute the resistivity of the given material whose resistance is 2 Ω; area of crosssection and length are 25cm2 and 15 cm respectively?
2. If the 0.100-mm diameter tungsten filament in a light bulb is to have a resistance of
0.200 Ω at 20ºC, how long should it be?
3. An electrician wishes to cut a copper wire ρ = 1.724 x 10 -8 Ω-m that has no more than
10Ω of resistance. The wire has a radius of 0.725mm. Approximately what length of wire
has a resistance equal to the10Ω maximum?
4. The diameter of a copper wire is 8.252 mm. Find the resistance of a 1.00-km length of
such wire used for power transmission.
5. A cable consists of seven straight strands of copper wire each of diameter 1.35 mm as
shown in the diagram. The length of the cable is 100m. What is the total resistance of
the seven stranded copper wire?
6. Two students are performing a lab using lengths of wire as resistors. The two students
have wires made of the exact same material, but Student B has a wire the has twice the
radius of Student A's wire. If Student B wants his wire to have the same resistance as
Student A's wire, how should Student B's wire length compare to Student A's wire?
7. A wire 12m long has a resistance of 1.5 Ω. What will be the resistance of 16m of the
same wire?
8. 365 x 10-6 m equivalent to what metric prefix?
9. 4,561,000,000m express it to scientific notation and metric prefixes.
10. 0.0006 express it to scientific notation.
11. 1000km express it to whole number and scientific notation.
12. 65678 µA express it to whole number and scientific notation.