Every Electrostatics & Capacitors question asked in RRB JE, Supervisor Instructor — solve, check instantly, then read the formula and exam tip.
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View answer & solution
A — Electric field. Every electric charge creates a region around it in which another charge experiences an electric force; this region is the electric field.
View answer & solutionSeries capacitors carry the same charge. Since V = Q/C, voltage is inversely proportional to capacitance: V(12 μF) : V(4 μF) = 4 : 12 = 1 : 3.
View answer & solutionD — Separation between the plates. For a parallel-plate capacitor C = εA/d, so capacitance depends on plate area, dielectric and plate separation — not on plate thickness, metal or applied voltage.
