A rectangular carbon block has dimensions 1.0 cm x 1.0 cm x 50 cm.
(i) What is the resistance measured between the two square ends?
(ii) Between two opposing rectangular faces?
Resistivity of carbon at 20º C is 3.5 x 10 -5 Ω Ω m.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
[(i) R = 
= 0.175 Ω Ω
(ii) R = 7 x 10 -5 Ω Ω ]
Sol. (i) R = 
= 
= 0.175 Ω Ω
(ii) R = 
= 7 × 10 –5 Ω Ω
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