A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The total flux for the surface of the cylinder is given by
(1)
(2)
(3)
(4) Zero
An electric charge q is placed at the centre of a cube of side α. The electric flux on one of its faces will be
(1)
(2)
(3)
(4)
Total electric flux coming out of a unit positive charge put in air is
(1)
(2)
(3)
(4)
A cube of side l is placed in a uniform field E, where . The net electric flux through the cube is
(1) Zero
(2) l2E
(3) 4l2E
(4) 6l2E
Shown below is a distribution of charges. The flux of electric field due to these charges through the surface S is
(1)
(2)
(3)
(4) Zero
The electric flux for Gaussian surface A that enclose the charged particles in free space is (given q1 = –14 nC, q2 = 78.85 nC, q3 = – 56 nC)
(1) 103 Nm2 C–1
(2) 103 CN-1 m–2
(3) 6.32 × 103 Nm2 C–1
(4) 6.32 × 103 CN-1 m–2
The electric intensity due to an infinite cylinder of radius R and having charge q per unit length at a distance r(r > R) from its axis is
(1) Directly proportional to r2
(2) Directly proportional to r3
(3) Inversely proportional to r
(4) Inversely proportional to r2
A positively charged ball hangs from a silk thread. We put a positive test charge q0 at a point and measure F/q0, then it can be predicted that the electric field strength E
(1) > F/q0
(2) = F/q0
(3) < F/q0
(4) Cannot be estimated
The charge on 500 cc of water due to protons will be:
1. | 6.0 × 1027 C | 2. | 2.67 × 107 C |
3. | 6 × 1023 C | 4. | 1.67 × 1023 C |
An electric dipole is situated in an electric field of uniform intensity E whose dipole moment is p and moment of inertia is I. If the dipole is displaced slightly from the equilibrium position, then the angular frequency of its oscillations is
(1)
(2)
(3)
(4)