Electrostatics Test

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Electrostatics Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

A parallel plate capacitor of capacitance 100 pF is to be constructed by using paper sheets of 1.0 mm thickness as dielectric. If the dielectric constant of paper is 4.0, the number of circular metal foils of diameter 2.0 cm each required for this purpose is

A
10

B
20

C
30

D
40
Question 2
1 / -0

In a hydrogen atom, the electron and the proton are bound together at a separation of about 0.53 Å. If the zero of potential energy is taken for an infinite separation of the electron from the proton, then the potential energy of the electron-proton system is

A
–54.4 eV

B
–27.2 eV

C
–13.6 eV

D
Zero
Question 3
1 / -0

Electric charges are of

A
5 types

B
3 types

C
2 types

D
4 types
Solution
Two types
- Positivecharge—deficiency of electrons i.e. if a body loses electrons it will be positive charged.
- Negative charge—excess of electrons i.e. if a body gains electrons it will be negative charged.
Question 4
1 / -0

n identical capacitors are joined in parallel and the combination is charged to voltage V. The total energy stored is U. The capacitors are now disconnected and joined in series. The total energy stored in the series combination will be

A
U/n

B
U

C
nU

D
n²U
Question 5
1 / -0

A soap bubble of radius r is charged to a potential V. If the radius is increased to nr, the potential of the bubble will become

A
nV

B
n²V

C
V/n

D
V/n²
Question 6
1 / -0

Electric charge

A
is a property of neutrons only

B
is a property of electrons only

C
is a property of protons only

D
is a property of particles such as atoms, ions, electrons etc

Solution

Every matter is made up of atoms which contains protons, electrons and neutrons.
Protons are +ve charged particles and electrons are - ve charged particles.
Because of electric charge these particles experience a force in electrical fields.

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Re-Attempt Weekly Quiz Competition

Electrostatics Test - 2

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Electrostatics Test - 2

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SHARING IS CARING

Question 1

10

20

30

40

Question 2

–54.4 eV

–27.2 eV

–13.6 eV

Zero

Question 3

5 types

3 types

2 types

4 types

Solution

Question 4

U/n

U

nU

n2U

Question 5

nV

n2V

V/n

V/n2

Question 6

is a property of neutrons only

is a property of electrons only

is a property of protons only

is a property of particles such as atoms, ions, electrons etc

Solution

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n²U

n²V

V/n²