For sharper edge, the ______ is greater. This principle is used in Lightning arrestor

(a)

linear charge density

(b)

surface charge density

(c)

volume charge density

(d)

capacitance

For continuous charge distributions, _____ methods can be used.

(a)

integration

(b)

differentiation

(c)

multiplication

(d)

addition

For a large charge accumulation, the end of the conductor should have larger curvature that is_________.

(a)

bigger radius

(b)

Smaller radius

(c)

maximum radius

(d)

less bent

Relative permittivity (ε_r) is also known as ________

(a)

dielectric strength

(b)

dielectric constant

(c)

polarisability

(d)

susceptibility

The energy stored per unit volume of space is defined as________.

(a)

linear density

(b)

surface density

(c)

volume density

(d)

energy density

__________ is a very large unit of capacitance.

(a)

Farad

(b)

Microfarad

(c)

Picofarad

(d)

Nanofarad

The total dipole moment per unit volume of the dielectric is________.

(a)

induction

(b)

charge distribution

(c)

polarisation

(d)

quantisation

An example for a Non-polar molecule is ____________.

(a)

H₂O

(b)

N₂O

(c)

CO₂

(d)

NH₃

Which instrument was used to demonstrate the electrostatic shielding?

(a)

Lightning arrester

(b)

Van de graaff generator

(c)

Faraday cage

(d)

Gold leaf electroscope

Gauss law is another form of ________.

(a)

Newton's law

(b)

Kepler's law

(c)

Ohm's law

(d)

Coulomb's law

If a cube of side 5cm has a charge of 6 micro coulomb, then the surface charge density is ________

(a)

4 x 10² μC/m²

(b)

4 x 10² C/m²

(c)

4 x 10³ μC/m²

(d)

4 x 10³ C/m²

The electric flux is ________ if the electric field lines enter the closed surface.

(a)

positive

(b)

negative

(c)

zero

(d)

maximum

Electrostatic force is stroger than gravitational force by_________.

(a)

2.23 x 10³⁹ times

(b)

2.25 x 10³⁹ times

(c)

2.27 x 10³⁹ times

(d)

2.29 x 10³⁹ times

Which of the following is a scalar quantity?

(a)

electric dipole moment

(b)

electric field intensity

(c)

electric potential

(d)

current density

Capacitors use the principle of ________.

(a)

self induction

(b)

mutual induction

(c)

electrostatic induction

(d)

dielectric polarisation

When a point charge of 6mC is moved between two points in an electric field, the work done is 1.8 x 10^-5 J. The potential difference between the two points is

(a)

1.08 V

(b)

1.08 μV

(c)

3 V

(d)

30 V

Electrostatics deals with the _________

(a)

charges in motion

(b)

static electric charges

(c)

charges through conductors

(d)

accelerated charges

When the amber is rubbed with fur, it absorbs bits of papers. This was invented by_______.

(a)

Amber

(b)

Thales

(c)

Gilbert

(d)

Benjamin Franklin

The force between like charges is _________.

(a)

attraction

(b)

repulsion

(c)

no force

(d)

none

The charge of an electron is _________.

(a)

1.6 x 10^-19 C

(b)

1.6 x 10^-91 C

(c)

16 x 10^-20 C

(d)

6.1 x 10 ^-19 C