Electrostatic Potential and Capacitance

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1. The process in which a region is made free from any electric field is known as _____________.

a.  Electrostatic forcing

b.  Electrostatic binding

c.   Electrostatic shielding

d.  None of the options

Answer: (c) Electrostatic shielding

Explanation: Electrostatic shielding is a phenomenon seen when a Faraday cage is used to block the effects of an electric field. (เค‡เคฒेเค•्เคŸ्เคฐोเคธ्เคŸैเคŸिเค• เคชเคฐिเคฐเค•्เคทเคฃ เคเค• เคเคธी เค˜เคŸเคจा เคนै เคœो เคคเคฌ เคฆेเค–ी เคœाเคคी เคนै เคœเคฌ เค•िเคธी เคตिเคฆ्เคฏुเคค เค•्เคทेเคค्เคฐ เค•े เคช्เคฐเคญाเคต เค•ो เคฐोเค•เคจे เค•े เคฒिเค เคซैเคฐाเคกे เคชिंเคœเคฐे เค•ा เค‰เคชเคฏोเค— เค•िเคฏा เคœाเคคा เคนै।)

2. The formula for electrostatic potential is _____________.

a.  Electrostatic potential = Work done*charge

b.  Electrostatic potential = Work done/charge

c.   Electrostatic potential = Work done+charge

d.  Electrostatic potential = Work done-charge

Answer: (b) Electrostatic potential = Work done/charge

Explanation: The formula for electrostatic potential is Electrostatic potential = Work done/charge.

3. 1 Volt = _____________ style-type: lower-alpha;”>

·  1 Coulomb

·  1 Newton / 1 Coulomb

·  1 Joule / 1 Coulomb

·  1 Newton / 1 meter

Answer: (c) 1 Joule / 1 Coulomb

Explanation: 1 V = 1 Joule / 1 Coulomb

4. The work done in moving a unit positive test charge over a closed path in an electric field is _____________.

a.  Always 1

b.  Infinite

c.   Zero

d.  Negative

Answer: (c) Zero

Explanation: We say electrostatic forces are conservative in nature since the work done in moving a unit positive test charge over a closed path in an electric field is zero. (เคนเคฎ เค•เคนเคคे เคนैं เค•ि เค‡เคฒेเค•्เคŸ्เคฐोเคธ्เคŸैเคŸिเค• เคฌเคฒ เคช्เคฐเค•ृเคคि เคฎें เคฐूเคข़िเคตाเคฆी เคนैं เค•्เคฏोंเค•ि เคตिเคฆ्เคฏुเคค เค•्เคทेเคค्เคฐ เคฎें เคเค• เคฌंเคฆ เคชเคฅ เคชเคฐ เคเค• เค‡เค•ाเคˆ เคธเค•ाเคฐाเคค्เคฎเค• เคชเคฐीเค•्เคทเคฃ เคšाเคฐ्เคœ เค•ो เคธ्เคฅाเคจांเคคเคฐिเคค เค•เคฐเคจे เคฎें เค•िเคฏा เค—เคฏा เค•ाเคฐ्เคฏ เคถूเคจ्เคฏ เคนै)

5. The electrostatic potential on the perpendicular bisector due to an electric dipole is _____________.

a.  Zero

b.  1

c.   Infinite

d.  Negative

Answer: (a) Zero

Explanation: The electrostatic potential on the perpendicular bisector due to an electric dipole is zero.

6. A surface that has the same electrostatic potential at every point on it is known as _____________.

a.  Equal-potential surface

b.  Same potential surface

c.   Equi-magnitude surface

d.  Equipotential surface

Answer: (d) Equipotential surface

Explanation: Equipotential surface is a surface formed by the locus of all the points which are at the same potential. Equipotential surfaces do not intersect with each other and are closely spaced in the region of strong electric fields and vice-versa. (เคธเคฎเคตिเคญเคต เคธเคคเคน เคเค• เคเคธी เคธเคคเคน เคนै เคœो เคธเคฎाเคจ เค•्เคทเคฎเคคा เคตाเคฒे เคธเคญी เคฌिंเคฆुเค“ं เค•े เคฌिंเคฆुเคชเคฅ เคธे เคฌเคจเคคी เคนै। เคธเคฎเคตिเคญเคต เคธเคคเคนें เคเค• เคฆूเคธเคฐे เค•े เคธाเคฅ เคช्เคฐเคคिเคš्เค›ेเคฆ เคจเคนीं เค•เคฐเคคी เคนैं เค”เคฐ เคฎเคœเคฌूเคค เคตिเคฆ्เคฏुเคค เค•्เคทेเคค्เคฐों เค•े เค•्เคทेเคค्เคฐ เคฎें เคจिเค•เคŸ เคฆूเคฐी เคชเคฐ เคนोเคคी เคนैं เค”เคฐ เค‡เคธเค•े เคตिเคชเคฐीเคค।)

7. The work done against electrostatic force gets stored in which form of energy?

a.  Thermal energy

b.  Kinetic energy

c.   Potential energy

d.  Solar energy

Answer: (c) Potential energy

Explanation: The work done against electrostatic force gets stored in the form of potential energy.

8. Dielectrics are _____________

a.  Conducting substances

b.  Non-conducting substances

c.   Semi-conducting substances

d.  None of the option

Answer: (b) Non-conducting substances

Explanation: Dielectrics are non-conducting substances.

9. The electric potential inside a conducting sphere _____________

a.  is zero

b.  increases from centre to the surface

c.   decreases from centre to the surface

d.  remains constant from centre to the surface

Answer: (d) remains constant from centre to the surface.

Explanation: The electric potential inside a conducting sphere remains constant from centre to the surface.

10. The capacity of the parallel plate capacitor increases when

a.  area of the plate is decreased

b.  area of the plate is increased

c.   distance between the plates increases

d.  None of the option

Answer: (b) area of the plate is increased

Explanation: The capacity of the parallel plate capacitor increases when the area of the plate is increased.

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