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The minimum distance between an object and its real image formed by a convex lens is
|
(a) 1.5 f |
(b) 2 f |
(c) 2.5 f |
(d) 4 f |
The equivalent quantity of mass in electricity is
|
(a) Charge |
(b) Potential |
(c) Inductance |
(d) Current |
If eight identical drops are joined to form a bigger drop, the potential on bigger as compared to that on smaller drop will be
|
(a) Double |
(b) Four times |
(c) Eight times |
(d) One time |
An electron and a proton with equal momentum enter perpendicularly into a uniform magnetic field, then
|
(a) The path of proton shall be more curved than that of electron |
|
(b) The path of proton shall be less curved than that of electron |
|
(c) Both are equally curved |
|
(d) Path of both will be straight line |
The intensity of electric field required to balance a proton of mass 1.7 
and charge 1.6 
is nearly
|
(a) |
(b) 1 |
(c) 1 |
(d) 1 |
In P-type semiconductor, there is
|
(a) An excess of one electron |
(b) Absence of one electron |
|
(c) A missing atom |
(d) A donar level |
