MCQ
Consider a uniform electric field in the $\hat{\text{Z}}$ direction. The potential is a constant:
- AIn all space.
- BFor any x for a given z.
- CFor any y for a given z.
- DOn the x-y plane for a given z.
✓
Answer
- For any x for a given z.
- For any y for a given z.
- On the x-y plane for a given z.
We know, the electric field intensity E and electric potential V are
$\text{E}=-\frac{\text{dV}}{\text{dr}}$
Electric potential decreases inf the direction of electric field. The direction of electric field is always perpendicular to one equipotential surface maintained at high electrostatic potential to other equipotential surface maintained at low electrostatic potential.
The electric field in z-direction suggest that equipotential surfaces are in x-y plane. Therefore the potential is a constant for any x for a given z, for any y for a given z and on the x-y plane for a given z.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Two wires of the same material are given. The first wire is twice as long as the second and has twice the diameter of the second. The resistance of the first will be
|
(a) Twice of the second |
(b) Half of the second |
|
(c) Equal to the second |
(d) Four times of the second |
Which state of triply ionised Baryllium (
has the same orbital radius as that of the ground state of hydrogen
|
(a) n = 4 |
(b) n = 3 |
(c) n = 2 | (d) n = 1 |
In the absence of an electric field, the mean velocity of free electrons in a conductor at absolute temperature (T) is:
A rope 1cm in diameter breaks if the tension in it exceeds 500N. The maximum tension that may be given to a similar rope of diameter 2cm is:
- 500N
- 250N
- 1000N
- 2000N.
In helium nucleus, there are
|
(a) 2 protons and 2 electrons |
(b) 2 neutrons, 2 protons and 2 electrons |
|
(c) 2 protons and 2 neutrons |
(d) 2 positrons and 2 protons |
Why does light travel as a wave?
The stopping potential is directly related to:
Energy conversion in a photoelectric cell takes place from
|
(a) Chemical to electrical |
(b) Magnetic to electrical |
|
(c) Optical to electrical |
(d) Mechanical to electrical |
Energy in a current carrying coil is stored in the form of:
A body having its centre of mass at the origin has three of its particles at (a, 0, 0), (0, a, 0), (0, 0, a). The moments of inertia of the body about the X and Y axes are 0.20kg-m2 each. The moment of inertia about the Z-axis:
→- Is 0.20kg-m2
- Is 0.40kg-m2
- Is $0.20\sqrt2\text{kg-m}^2$
- Cannot be deduced with this information.