What is the conductors resistance if it's length is .5m and hasa cross-section area of .02m 2 with a resistivity of.1Ω?
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Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with an area of cross-section and respectively.
A block of carbon is 7.8 cm long and hasa square cross-sectional area with sides of8.9 cm. A potential difference 5.8 V is main-tained across its length.The resistivity of carbon is 8.2Ã10â5 Ω*mWhat is the resistance of the resistor?Answer in units of mΩ
What is the current of the resistor?
Q1)
Thethird rail of a subway track (the rail that carries the current) ismade of steel ( resistivity psteel =2 x 10-7 Ω *m) and hasa cross-sectional area about 55 cm2. What is theresistance of 10 km of track?