MCQs of Static Electric Fields (Electromagnetics Field - 3140912)

Electromagnetics Field (3140912) MCQs

MCQs of Static Electric Fields

Showing 11 to 20 out of 96 Questions

11.

If the distance between two point charges is doubled, the Coulomb's force between the charges will be

(a)	four times more
(b)	four times less
(c)	two times more
(d)	two times less

12.

Force exists between two point charge present in free space. If the charges are moved to medium with relative permittivity of 5 without altering the distance between them, the new force between them will

(a)	increase by 5 times
(b)	increase by 25 times
(c)	decrease by 0.2 times
(d)	decrease by 25 times

13.

Force exists between two point charges placed in a free space. If each of the charge is doubled and the distance between them is also doubled, the Coulomb's force between them will __________ .

(a)	increase by 2 times
(b)	increase by 4 times
(c)	increase by 8 times
(d)	not change.

14.

Unit of Electric field intensity

E

is _________ .

(a)	Newton/Coulomb
(b)	Volt meter
(c)	Both (A) and (B)
(d)	None of the above

15.

A point charge Q present at origin in a free space produces electric filed for which the z-component of

E

is 1 kV/m at point P(-2,1,-1). The value of Q will be__________.

(a)	$- 16.3 μ C$
(b)	$16.3 μ C$
(c)	$- 1.63 μ C$
(d)	$1.63 μ C$

16.

Identical point charges of 120 nC are located at A(0,0,1) and B(0,0,-1). Find the value of point charge that can be placed at origin so that the net Electric field intensity

E

at point P(0.5,0,0) will be zero.

(a)	21.35 nC
(b)	-21.35 nC
(c)	2.13 nC
(d)	-2.13 nC

17.

The force experienced by the point charge of 2 C place in an electric filed with uniform electric field intensity of 1 V/m will be ___________ .

(a)	0.5 N
(b)	1 N
(c)	2 N
(d)	4 N

18.

Uniform line charge of charge density 5 nC/m is located in free space along the line defined by y = -2 , z = 5. The

E

at point (1,2,3) will be ___________ .

(a)	$18 a_{y} + 9 a_{z}$
(b)	$18 a_{y} - 9 a_{z}$
(c)	$9 a_{y} + 4.5 a_{z}$
(d)	$9 a_{y} - 4.5 a_{z}$

19.

Divergence of

E

at a point in free space at finite distance r from infinite length uniform line charge will be ____________ .

(a)	zero
(b)	finite and function of distance r
(c)	finite and independent of distance r
(d)	indeterminate

20.

Two infinite spread uniform surface charge of charge density

20 μ C / m^{2}

are located at

x = \pm 1 m

E

at point P(0,1,1) will be __________ .

(a)	$2.26 a_{x} μ V / m$
(b)	$- 2.26 a_{x} μ V / m$
(c)	$- 1.13 a_{x} μ V / m$
(d)	0

Showing 11 to 20 out of 96 Questions