Electrostatic Potential and Capacitance Test

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Electrostatic Potential and Capacitance Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Work done in carrying 2 C charge in a circular path of radius 2 m around a charge of 10 C is

A
Zero

B
6.67J

C
15 J

D
60J

Solution

work done in moving a charge along a closed path is zero.
Question 2
1 / -0

Materials in which outer electrons are loosely bound and free to move within the metal at normal temperature are called

A
Insulators

B
Semiconductors

C
Conductors

D
Superconductors

Solution

In metallic conductors, the electrons of the outer shells of the atoms are loosely bound to the nucleus. They easily get detached from atom and move freely inside the metal.
Question 3
1 / -0

The polarized dielectric is equivalent to

A
two charged surfaces with induced surface charge densities

B
one charged surface with induced surface charge density

C
zero surface charge density

D
non-zero volume charge density

Solution

Two charged surfaces are created and these have equal and opposite charge densities.
Question 4
1 / -0

If a unit charge is taken from one part to another part over an equipotential surface, then what is the change in electrostatic potential energy of the charge?

A
1 J

B
10 J

C
100 J

D
0 J

Solution

As the potential of equipotent surface is constant, therefore the amount of work done could be,

W = q (V_f – V_i)

= q ( V – V )

= 0 J
Question 5
1 / -0

The shape of equipotential surfaces for a uniform field is

A
Parallel plane surfaces perpendicular to lines of force

B
Coaxial cylindrical surfaces

C
Parallel plane surfaces

D
None of above

Solution

A electric field lines are always perpendicular to equipotential surfaces.
Question 6
1 / -0

Which of the following statement is not true for non-polar molecules?

A
the centres of positive and negative charges coincide

B
no permanent dipole moment

C
examples are oxygen and hydrogen molecules

D
examples are HCl or water molecules

Solution

The HCl and water molecules are polar molecules.

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Re-Attempt Weekly Quiz Competition

Electrostatic Potential and Capacitance Test - 5

Result

Electrostatic Potential and Capacitance Test - 5

Score

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Rank

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SHARING IS CARING

Question 1

Zero

6.67J

15 J

60J

Solution

Question 2

Insulators

Semiconductors

Conductors

Superconductors

Solution

Question 3

two charged surfaces with induced surface charge densities

one charged surface with induced surface charge density

zero surface charge density

non-zero volume charge density

Solution

Question 4

1 J

10 J

100 J

0 J

Solution

W = q (Vf – Vi)

= q ( V – V )

= 0 J

Question 5

Parallel plane surfaces perpendicular to lines of force

Coaxial cylindrical surfaces

Parallel plane surfaces

None of above

Solution

Question 6

the centres of positive and negative charges coincide

no permanent dipole moment

examples are oxygen and hydrogen molecules

examples are HCl or water molecules

Solution

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W = q (V_f – V_i)