State Gauss's theorem and use it to find the field of an infinite line of charge.
Electrostatics
Original Khojo Papers practice question — not from a past board paper.
18 μF and 1.8 × 10−3 C
No citable source has been recorded for this record. Treat it as practice material, not as fact.
In parallel the capacitances add, giving 18 μF, and Q = CV = 18 × 10−6 × 100 = 1.8 mC.
From the same topic and chapter, at a similar level.
State Gauss's theorem and use it to find the field of an infinite line of charge.
Electrostatics
What is an equipotential surface? State two of its properties.
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A capacitor of 10 μF is charged to 100 V. Find the energy stored in it.
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What is a dielectric, and how does inserting one between the plates of a capacitor change its capacitance?
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Two capacitors of 2 μF each are joined in series and then in parallel. Find the equivalent capacitance in each case.
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Calculate the electric field at a point 0.3 m from a point charge of 2 × 10−6 C in air.
Electrostatics