The following questions ask you to solve problems involving topics we've covered this week. Work...

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The following questions ask you to solve problems involving topics we've covered this week. Work each problem, and post an image of your work for each question, along with a brief description of how you solved the problem. Your work should include a step-by-step solution to the problem.Question 1Aluminum has a resistivity of 2.7*10-8 Om. What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?Question 2A 10 ohm resistor and a 20 ohm resistor are connected in parallel. What is the equivalent resistance of this setup?Question 3A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?Question 4A 30 ohm resistor is connected to a 1.5 V battery. How much power is dissipated by the resistor?Question 5Two point charges, each 6*10-5 C, are separated by 30 cm. What is the electrostatic force produced by this arrangement?
	
Document Preview: The following questions ask you to solve problems involving topics we've covered this week. Work each problem, and post an image of your work for each question, along with a brief description of how you solved the problem. Your  work should include a step-by-step solution to the problem.Question 1  Aluminum has a resistivity of 2.7*10-8 Om.  What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?Question 2  A 10 ohm resistor and a 20 ohm resistor are connected in parallel.  What is the equivalent resistance of this setup?Question 3  A 4 ohm resistor and 10 ohm resistor are connected in series.  If this circuit is connected to a 12 V battery, how much current will flow through the circuit?Question 4  A 30 ohm resistor is connected to a 1.5 V battery.  How much power is dissipated by the resistor?Question 5  Two point charges, each 6*10-5 C, are separated by 30 cm.  What is the electrostatic force produced by this arrangement?

David · Accepted Answer

Question 1  
Aluminum has a resistivity of 2.7*10-8 Ωm.  What would be the resistance of 100 m of aluminum wire with a cross-sectional area of 2*10-4 m2?
Solution:
Expression of resistance is given as,
R = ρ l / A
Where ρ is resistivity of the material;
l is length of the wire; and
A is cross-sectional area of the wire
Appying above formula we get,
R = 2.7*10-8*100 / (2*10-4)
R = 1.35*10-2 Ω
Question 2  
A 10 ohm resistor and a 20 ohm resistor are connected in parallel.  What is the equivalent resistance of this setup?
Solution:
Above circuit shows two resistances connected in parallel.
Let A voltage source of  “V” volt is connected across the resistances and total equivalent resistances of the combination is “R”
Therefore from this assumptions,

The following questions ask you to solve problems involving topics we've covered this week. Work each problem, and post an image of your work for each question, along with a brief description of how...

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