A copper wire has diameter 0.5mm and resistivity of 1.6*10(to the power -8) ohm m.what will be the length of this wire to make its resistance 10 ohm?how much does the resistance change if the diameter is doubled?
Asked by vaishakhautade25
10th June 2017,
2:52 PM
Answered by Expert
Answer:
From the expression of resistance, it is clear that it is inversely proportional to the square of diameter.
Hence, if the diameter is doubled, resistance becomes 0ne-fourth. In the above example the resistance
would become 10/4= 2.5 Ω
Answered by Expert
11th June 2017,
2:25 PM
Rate this answer
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
You have rated this answer /10
Your answer has been posted successfully!
RELATED STUDY RESOURCES :
Browse free questions and answers by Chapters
- 1 Thermodynamics
- 2 Gravitation
- 3 Electromagnetic Waves
- 4 Communication Systems
- 5 Laws of Motion
- 6 Current Electricity
- 7 Work, Energy and Power
- 8 Kinematics
- 9 Physics and Measurement
- 10 Rotational Motion
- 11 Properties of Solids and Liquids
- 12 Kinetic Theory of Gases
- 13 Oscillations and Waves
- 14 Electrostatics
- 15 Magnetic Effects of Current and Magnetism
- 16 Electromagnetic Induction and Alternating Currents
- 17 Optics
- 18 Dual Nature of Matter and Radiation
- 19 Atoms and Nuclei
- 20 Electronic Devices
Trending Tags
Latest Questions
JEE Main Mathematics
Asked by amaladelsingh
28th October 2020,
10:24 PM
CBSE X Biology
Asked by reenacharan2008
28th October 2020,
9:11 PM
