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IQ-26-027 · Weekly MCQ test — Electrostatics
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| # | Question | Answer | Marks |
|---|---|---|---|
| 1 | The potential gradient at a point in an electric field is equal to: | C. The negative of the electric field intensity | 1 / 1 |
| 2 | One electron volt (1 eV) is equal to: | C. 1.6 × 10⁻¹⁹ J | 1 / 1 |
| 3 | If the distance between two point charges is doubled, the Coulomb force between them becomes: | B. One-fourth | 1 / 1 |
| 4 | What is the SI unit of electric charge? | B. Coulomb | 1 / 1 |
| 5 | Electric field intensity at a point is the force per unit: | C. Positive test charge | 1 / 1 |
| 6 | According to Gauss's law, the electric flux through a closed surface depends on: | A. The charge enclosed by the surface | 2 / 2 |
| 7 | The capacitance of a parallel-plate capacitor increases when: | A. The area of the plates is reducedCorrect: D. A dielectric is placed between the plates | 0 / 2 |
| 8 | The time constant of a series RC circuit is: | A. RC | 1 / 1 |
Chose C — The negative of the electric field intensity
Chose C — 1.6 × 10⁻¹⁹ J
Chose B — One-fourth
Chose B — Coulomb
Chose C — Positive test charge
Chose A — The charge enclosed by the surface
Chose A — The area of the plates is reduced
Chose A — RC