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IQ-26-021 · Weekly MCQ test — Electrostatics
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| # | Question | Answer | Marks |
|---|---|---|---|
| 1 | According to Gauss's law, the electric flux through a closed surface depends on: | B. Charges outside the surfaceCorrect: A. The charge enclosed by the surface | 0 / 2 |
| 2 | The potential gradient at a point in an electric field is equal to: | D. The negative of the electric field intensity | 1 / 1 |
| 3 | If the distance between two point charges is doubled, the Coulomb force between them becomes: | C. One-fourth | 1 / 1 |
| 4 | What is the SI unit of electric charge? | D. Coulomb | 1 / 1 |
| 5 | One electron volt (1 eV) is equal to: | A. 1.6 × 10⁻¹⁹ J | 1 / 1 |
| 6 | The capacitance of a parallel-plate capacitor increases when: | B. A dielectric is placed between the plates | 2 / 2 |
| 7 | Electric field intensity at a point is the force per unit: | B. Positive test charge | 1 / 1 |
| 8 | The time constant of a series RC circuit is: | B. RC | 1 / 1 |
Chose B — Charges outside the surface
Chose D — The negative of the electric field intensity
Chose C — One-fourth
Chose D — Coulomb
Chose A — 1.6 × 10⁻¹⁹ J
Chose B — A dielectric is placed between the plates
Chose B — Positive test charge
Chose B — RC