50 ). The physical quantity which i...
Question

# 50 ). The physical quantity which is experessed as the prod- uct of electric current and potential difference is (a) resistance (b) resistivity (c) electric energy (d) electric power. TYPE C: BASED ON UNDERSTANDING A metallic conductor has loosely bound electrons called free electrons. The metallic conductor is (a) negatively charged (6) positively charged (c) neutral (d) either positvely charged or negatively charged. The number of electrons constituting 1 coulomb charge is (a) 6.25 × 10-19 (6) 6.25 × 1019 (c) 6.25 x 10-18 (d) 6.25 x 1018 52. Resistance of a metallic conductor (a) increases with the increase in temperature (6) increases with the decrease in temperature (c) decreases with the increase in temperature (d) none of these. 53. Resistance of a conductor varies (a) inversely proportional to its length (b) inversely proportional to square of its length (c) directly proportional to its length (d) directly proportional to square of its length. 54. Resistivity of a metallic wire depends upon (6) its shape (a) its length (d) nature of material (c) its thickness

NEET/Medical Exams
Physics
Solution
48
4.0 (1 ratings)
s.1 ( 6.25 times 10^{18} e^{-} rightarrow 10 ) sis ( R propto frac{l}{A} ).