- #1
nomnom
- 1
- 0
Homework Statement
the actual question is
the resitivity of tungsten metal is 4.9x10to the power of -6 Ωcm. choose appropriate values for length and cross-sectional area for a home made wire resistor of resitstance 20Ω
Homework Equations
r=pl/a
r-resistance
a-cross sectional area in m squared
l- length of wire in meters
p is resistivity of the material in ohm(meters)
The Attempt at a Solution
i don't even know wher to start all i know is that i need to find L and A but i only know p's value, please help,