Questions
Two solid conductors are made up of same material, have same length and same resistance. One of them has a circular cross section of area and the other one has asquare cross section of area . The ratio is
detailed solution
Correct option is C
Resistance of conductoris given asR=ρlA∴ A=ρlR⇒A1A2=ρ1ρ2×l1I2R2ℝ1⇒A1A2=1 ∵R1=R2,I1=I2 and for same material ρ1=ρ2Talk to our academic expert!
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In a common-base mode of transistor, the collector current is 5 488 mA for an emitter current of 5 .60 mA. The value of the base current amplification factor (p) will be
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