NEET Physics Electric Charges and Fields MCQs Set A

a) shall increase along the positive x-axis
b) shall decrease along the positive x-axis
c) shall point along the negative x-axis
d) shall increase but the direction changes because of the intersection of Q with q₂ and q₃
Answer: shall increase along the positive x-axis

Question: A point positive charge is brought near an isolated conducting sphere (figure). The electric field is best given by

a)

b)

c)

d)

Answer:

Question:

a) is the same for all the figures
b) in Fig. (ii) is same as Fig. (iii) but is smaller than Fig. (iv)
c) in Fig. (iii) is the least
d) in Fig. (iv) is the largest
Answer:  is the same for all the figures

Question:

a) E on the LHS of the above equation will have a contribution from all charges while q on the RHS will have a contribution from q₂ and q₄ only
b) Both E on the LHS and q on the RHS will have contributions from q₂ and q₄ only
c) Both E on the LHS and q on the RHS will have contributions from q₂ and q₄ only
d) None of these
Answer: E on the LHS of the above equation will have a contribution from all charges while q on the RHS will have a contribution from q₂ and q₄ only

Question:

a) The dipole will experience a force towards left
b) The dipole will experience a force upwards
c) The dipole will experience a force towards right
d) The dipole will not experience any force
Answer:  The dipole will experience a force towards left

Question: A point charge + q is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is
a) directed perpendicular to the plane and away from the plane
b) directed perpendicular to the plane but towards the plane
c) directed radially towards the point charge
d) directed radially away from the point charge
Answer: directed perpendicular to the plane and away from the plane

Question: A hemisphere is uniformely charged positively. The electric field at a point on a diameter away from the centre is directed
a) perpendicular to the diameter
b) parallel to the diameter
c) at an angle tilted towards the diameter
d) at an angle tilted away from the diameter
Answer: perpendicular to the diameter

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question:

a) –q
b) – 2q
c) q
d) – 3q
Answer:  –q

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) 2
b) 7
c) 5
d) 3
Answer:  2

Question:

a)

b)

c)

d)

Answer:

Question:

a) 6
b) 5
c) 7
d) 4
Answer:  6

More Questions.....................................

Question:

a)

b)

c)

d)

Answer:

Question:

a) reduces by 70.7%
b) reduces by 9.7%
c) reduces by 29.3%
d) reduces by 14.6%
Answer:  reduces by 70.7%

Question:

a) 10^–37
b) 10^–47
c) 10^–20 C
d) 10^–23C
Answer: 10^–37

Question:  Assertion : The positive charge particle is placed in front of a spherical uncharged conductor. The number of lines of forces terminating on the sphere will be more than those emerging from it.
Reason : The surface charge density at a point on the sphere nearest to the point charge will be negative and maximum in magnitude compared to other points on the sphere.
a) If both the Assertion and Reason are incorrect
b) If Assertion is correct but Reason is incorrect
c) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion
d) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
Answer: If both the Assertion and Reason are incorrect

Question:

a) 60°
b) 90°
c) 30°
d) 45°
Answer:  60°

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:  An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is
a) smaller
b) 5 times greater
c) equal
d) 10 times greater
Answer: smaller

Question:Assertion : On moving a distance two times the initial distance away from an infinitely long straight uniformly charged wire the electric field reduces to one third of the initial value.
Reason : The electric field is inversely proportional to the distance from an infinitely long straight uniformly charged wire.
a) Assertion is correct, reason is correct; reason is a correct explanation for assertion
b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
c) Assertion is correct, reason is incorrect
d) Assertion is incorrect, reason is correct
Answer:  Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:

a) zero
b)

c)

d) None of these
Answer:  zero

Question:

a)

b)

c)

d) None of these
Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) 2
b) 5
c) 3
d) 4
Answer:  2

Question:

a)

b)

c)

d)

Answer:

Question:  A charged particle q is placed at the centre O of cube of length L (A B C D E F G H). Another same charge q is placed at a distance L from O. Then the electric flux through ABCD is

a) zero
b)

c)

d)

Answer:  zero

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c) Both

d) None of thuse

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question:

a)

b)

c)

d)  Zero

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c) 0

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d) None of these

Answer:

Question:

a)

b)

c)

d)

Answer: