## Physics MCQ on Electric flux for NEET, JEE, Medical and Engineering Exam 2021

MCQ on Electric flux: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Electric flux, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

## MCQ on Electric flux

Q1. Determine the electric flux of a flat square having an area of 10m2 is a uniform electric field of 8000 N/C passing perpendicular to it
a) 8x 105 Nm2/C
b) 8x 104 Nm2/C
c) 16x 105 Nm2/C
d) 16x 104 Nm2/C

(b) 8x 104 Nm2/C

Q2. The dimension of electric flux is
a) [M2L2T3A1]
b) [MLT-3A-1]
c) [M3L3T-3A-1]
d) [ML3-3A-1]

(d) [ML3-3A-1]

Q3. When is the flux through a surface taken as positive
a) When the flux lines are directed inwards
b) When the flux lines are directed outwards
c) No flux lines through the surface
d) Flux lines are parallel to each other

(b) When the flux lines are directed outwards

Q4. The electric flux through a cubical Gaussian surface enclosing net charge q is q/ε0. While the electric flux through one face of a cube is
a) q/ε0
b) q/6ε0
c) q/4πε0
d) q/4ε0

(b) q/6ε0

Q5. If a unit positive charge is kept in the air. Then the total flux coming out of unit charge is
a) 4πε0-1
b) 4πε0
c) ε0-1
d) ε0

(c) ε0-1

Q6. The net charge through a closed surface in a given medium depends on
a) Size of the surface
b) Charge of the surface
c) The shape of the surface
d) Area of the surface

(b) Charge of the surface

Q7. What is the value of total flux through the faces of the cube with the sides of length a if a charge Q is placed at corner A of the cube is

a) q/ε0
b) q/2ε0
c) q/4ε0
d) q/8ε0

(d) q/8ε0

Q8. A point charge q is placed at a distance a/2 directly above the centre of the square of side a. The electric flux through the square is
a) ) q/ε0
b) ) q/6ε0
c) ) q/4πε0
d) ) q/4ε0

Q9. A plane surface is rotated in a uniform electric field. When is the flux of the electric field through the surface maximum?
a) When the surface is perpendicular to the field
b) When the surface is parallel to the field
c) When the surface is at an angle of 300with the field
d) When the surface is at an angle of 450 with the field

(a) When the surface is perpendicular to the field

Q10. What is the value of electric flux (Φ) on a plane of area 1m2 on which an electric field of 2 V/m crosses with an angle of 300.
a) 1Vm
b) 2Vm
c) 3Vm
d) 4Vm

(a) 1Vm