An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin=8.74A
Added by Brian M.
Step 1
74A), we need to select a wire gauge that can safely carry this current. Copper wire has a specific current carrying capacity based on its gauge. We can refer to a wire gauge chart or use an online calculator to find the appropriate gauge for 8.74A. Show more…
Show all steps
Your feedback will help us improve your experience
Penny Riley and 63 other Physics 101 Mechanics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Copper has a resistivity of ̑̑c = 1.72 × 10⁻⁸ Ω·m. An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin = 6.5 A in order to operate. The cord is connected to a V = 196 V source. Part (a) Input an expression for the maximum ratio of length to cross-sectional area, γ, the cord can have if the motor is to operate. Part (b) What is the ratio numerically in 1/m? Part (c) Experimentally, it is found that the maximum length the cord can be is Lmax = 30 m. What is the wire's minimum diameter, Dmin, in meters?
Penny R.
Problem 4: Copper has a resistivity of Pc = 1.72 x 10^-8 Ω-m. An extension cord made of copper is connected to a DC electric motor which requires a current of at least Imin = 75A in order to operate. The cord is connected to a V = 115V source. Part (a) Input an expression for the maximum ratio of length to cross-sectional area the cord can have if the motor is to operate. Part (b) What is the ratio numerically in [m^-1]? Part (c) Experimentally, it is found that the maximum length the cord can be is Lmax = 30m. What is the wire's minimum diameter, Dmin, in meters?
Sri K.
An $8.00$ -ft extension cord has two 18 -gauge copper wires, each with a diameter of $1.024 \mathrm{~mm}$. What is the $I^{2} R$ loss in this cord when it carries a current of (a) $1.00 \mathrm{~A} ?$ (b) $10.0 \mathrm{~A}$ ?
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD