current and electricity online Test
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The amount of charge Q passed in time t through a cross-section of a wire is Q = 5t2 + 3t + 1. The value of current at time t = 5 s is
9 A
49 A
53 A
none of these
The electric potential V is given as a function of distance x (metre) by V = (5x2 + 10x – 4) volt. Value of electric field at x = 1 m is
–23 V/m
11 V/m
6 V/m
–20 V/m
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20(
30(
40(
two copper wires have their masses in the ratio 2:3 and the lengths in the ratio 3:4. The ratio of their resistances is
Description:
it is mcq type of paper
new concepts can be learned from the test. it includes concepts like potentiometer, combination of cells, combination of resistances like series parallel, wheatstonr bridge symmetry, star and delta conversions,meter bridge , po box, drift velocity,power, heat dissipation , capacitors, charging and discharging of capacitors.Concepts like kvl, kcl - kirchoff's laws are widely used,
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