- AZero.
- BHighly positive.
- CHighly negative.
- DVaries from place to place.
Explanation:
We consider earth as the storage of infinite positive as well as a negative charge. Therefore, the potential of the earth is always considered to be zero and the potential of every body is measured with respect to earth. That’s why if we connect any charged body to the earth, its potential instantaneously becomes zero.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The light of wavelength 6328 Å is incident on a slit of width 0.2 mm perpendicularly, the angular width of central maxima will be
|
(a) 0.36° |
(b) 0.18 ° |
(c) 0.72° |
(d) 0.09° |
Then
An object 5 cm tall is placed 1m from a concave spherical mirror which has a radius of curvature of 20 cm The size of the image is
|
(a) 0.11 cm |
(b) 0.50 cm |
(c) 0.55 cm |
(d) 0.60 cm |
Ionization energy of hydrogen is 13.6 eV. If h = 6.6
, the value of R will be of the order of
|
(a) |
(b) |
(c) |
(d) |
The period of oscillation of a magnet in vibration magnetometer is 2 sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is
| (a) 1 sec | (b) 4 sec | (c) 8 sec | (d) 0.5 sec |
