Question

1)Electrical resistance for a wire of any size can be calculated using the relation: R =...

1)Electrical resistance for a wire of any size can be calculated using the relation: R = pL/A

where R = resistance ?, p = resistivity (?-cm), L = wire length (cm),

p = 112 u? cm. For a 10-m length of 16-gauge (diameter = 1.291 mm) nichrome wire, find the resistance. If a current of 4 A flows in the wire, find the voltage drop and power dissipation.

2)A standard power value for a household incandescent lightbulb is 60 W. What is the current through the filament of such a lightbulb if the voltage is 110 V? Is the entire 60 W of electrical power converted into visible light? Explain

3)A 82@? power resistor carries a current of 300 mA. What is the voltage across the resistor? What is the power dissipation? If power resistors are available in power ratings of 1, 2, 5, and 10 W, which power rating should probably be selected?

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A wire with a radius R = .89 mm and length 45 cm is made of...
A wire with a radius R = .89 mm and length 45 cm is made of two materials, Carbon and Nichrome (resistivity not given I assume it needs to be googled). The Carbon portion is 15 cm long. The temperature of the wire is 75 oC. The wire is connected to a 12 volt battery. a) Find the total Resistance of the battery as well as the current (I) and the current density (J) and the electric field (E) in...
The resistivity of copper is 1.68 x 10-8 W-m.  The resistance per unit length (R/L) of a...
The resistivity of copper is 1.68 x 10-8 W-m.  The resistance per unit length (R/L) of a certain copper cable is 1.61 x 10-5W/m. (a) What is the cross sectional area of the cable? (b) The above cable is used to transmit electricity from a power station to an electrical substation 42.8 km distant.  If the voltage at the substation is 2480 V, what is the required voltage at the power station when the current running through the cable is 856 A?...
1. A resistor with a resistance of 408 Ohms is connected to a 13 V battery...
1. A resistor with a resistance of 408 Ohms is connected to a 13 V battery . The current flowing through the resistor is a) 29.4 mA b) 4.896 A c) 12 mA d) 34 A 2) As you add more resistors in parallel to a circuit , the total voltage . a) remains the same b) increases c) decreases 3. A runner is approaching an ice cream truck that is double parked . The ice cream truck is playing...
1. What is the resistance of a NichromeTM wire at 0.0 ∘C∘C if its resistance is...
1. What is the resistance of a NichromeTM wire at 0.0 ∘C∘C if its resistance is 106.9 ΩΩ at 12.5 ∘C∘C? The temperature coefficient of resistivity for NichromeTM is 4.00×10−4 (∘C)−1(∘C)−1 . Enter your answer with four significant figures. 2. A heart defibrillator is used to enable the heart to start beating if it has stopped. This is done by passing a large current of 12 AA through the body at 30 VV for a very short time, usually about...
1. Suppose you have a pocket calculator that draws a current of 0.17 mA from its...
1. Suppose you have a pocket calculator that draws a current of 0.17 mA from its 1.3-V battery. Calculate the effective resistance of the pocket calculator, in kilohms. 2. The diameter of a specific copper wire is 8.203 mm, and has a resistivity of 1.72 × 10-8 Ω⋅m. Find the resistance of a 0.75 km length of such wire used for power transmission in Ω 3.Find the power dissipated (in W) in each of the following extension cords: Part (a)...
Power can be determine by using three possible ways and there are P = I x...
Power can be determine by using three possible ways and there are P = I x V, P = V2 / R and P = I2 X R. This experiment will use 2 k resistor which having resistance accuracy limitation of ±0.25%. The measurement was taken by using voltmeter with the accuracy limitation within ±0.55% of the maximum range, 10 V to measure the voltage across the resistor and an ammeter having accuracy limitation within ±0.40% of maximum range, l0mA...
Please explain this answer in 1-2 paragraphs and include physics concepts. QUESTION: An electrical circuit has...
Please explain this answer in 1-2 paragraphs and include physics concepts. QUESTION: An electrical circuit has three devices each plugged into a standard household powerpoint. Device A has a resistance of 1.0 kΩ (kiloohm), device B has a resistance of 3.0 kΩ and device C has a resistance of 6.0 kΩ. If all three devices are turned on for 15 minutes, what will the total energy consumption of the three devices? ANSWER: Household Powerpoint Device A – 1.0 kiloohm (kΩ)...
Please provide a brief overview on: chapter 21 1. Can I obtain the net electric field...
Please provide a brief overview on: chapter 21 1. Can I obtain the net electric field due to two or more point charges? 2. Can I obtain the net Coulomb force on a point charge due to two or more point charges? 3. Can I draw physical quantities (for example, velocity, forces or electric fields) involved in a given problem in a diagram? 4. Do I have a good "qualitative" understanding of the motion of a charged particle in a...
1) 2 point charges are separated by a distance of 8 cm. The left charge is...
1) 2 point charges are separated by a distance of 8 cm. The left charge is 48 mC and the right charge is -16mC. Using a full sheet of paper: draw the 2 charges separated by 8cm, centered in the sheet. (if you are missing a ruler estimate 8cm as ⅓ a paper sheet length). [6] a) Draw field lines to indicate the electric fields for this distribution. [4] b) Draw 3 equipotential surfaces, 1 each, that pass: -Through the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT