NDA Physics
Electricity — Quiz
20 Questions · No Negative Marking
Question 1
The drift velocity of electrons in a conductor of cross-section A, carrier density n, and current I is:
Av_d = nAeI
Bv_d = I/nAe
Cv_d = nAe/I
Dv_d = I/ne
Question 2
The temperature dependence of resistance of a metallic conductor is R = R₀(1 + αΔT). For a semiconductor, the resistance:
AIncreases with temperature like metallic conductors
BDecreases with temperature
CRemains constant regardless of temperature
DFirst increases then decreases with temperature
Question 3
Kirchhoff's Voltage Law (KVL) states that the algebraic sum of potential differences around any closed loop is:
AMaximum
BMinimum
CZero (based on conservation of energy)
DEqual to the EMF of the battery
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