Electric Charges and Electric Fields  MCQs

MCQs of Electric Charges and Electric Fields

Showing 1 to 10 out of 141 Questions
1.
An electric dipole is placed at the centre of a sphere. The flux passing through the surface of the sphere is _____
(a) Infinity
(b) Zero
(c) Cannot be found
(d) 2qε0
Answer:

Option (b)

2.
One point electric charge Q is placed at P. A closed surface is place near the point P. The electrical total flux passing through a surface of the sphere will be _____
(a) Qε0
(b) ε0Q
(c) Qε0
(d) Zero
Answer:

Option (d)

3.
The electric intensity at the mid point, between the region of two parallel metal sheets, each sheet having σ surface density and same kind of charge will be _____
(a) σ2ε0
(b) σε0
(c) zero
(d) 2ε0σ
Answer:

Option (c)

4.
Charg Q is placed at the centre of a cube. Then the total flux passing through the cube = _____
(a) Q8ε0
(b) Q6ε0
(c) Q3ε0
(d) Qε0
Answer:

Option (d)

5.
The dimensional formula of electrical field intensity is _____
(a) M1L1T-1A-1
(b) M1L2T-3A-1
(c) M1L1T-3A-1
(d) M1L0T-3A-1
Answer:

Option (c)

6.
The electric dipole moment of a HCI atom is 3.4 × 10-30 cm. The charges on both atoms are unlike and of same magnitude. Magnitude of this charge is _____ . The distance between the charges is 2Å.
(a) 3.4 × 10-10 C
(b) 3.4 × 10-20 C
(c) 6.8 × 10-20 C
(d) 1.7 × 10-20 C
Answer:

Option (d)

7.
The force of repulsion between two like or point charges + 2C and + 6C is 12N, when charge q is added to both, the force of attraction between them will be 4 N, so q = _____ C.
(a) + 4
(b) - 4
(c) + 1
(d) - 1
Answer:

Option (b)

8.
The linear charge density on a straight wire of lenghth L is given by λ(x) = λ0 x3. The total charge on the wire will be ____ C.
(a) λ0L44
(b) λ0L2
(c) λ0L
(d) λ0L22
Answer:

Option (a)

9.
The charge density of a spherical shell of radius R is represented by ρ(r) = βr2. So the total charge on the sphere would be _____
(a) 43πR3β
(b) 23πR3β
(c) 45πR5β
(d) Zero
Answer:

Option (c)

10.
The value of permittivty of vaccum is 8.85 × 10-12 C2N-1m-2 and the dielectric constant of water is 81. So the permittivity of water will be _____ C2N-1m-2.
(a) 81 × 8.86 × 10-12
(b) 8.86 × 10-12
(c) 8.86 × 10-1281
(d) 818.86 × 10-12
Answer:

Option (a)

Showing 1 to 10 out of 141 Questions