- ABecomes neutral.
- BDoes not lose any charge.
- CLoses whole of the charge on it.
- DLoses part of the charge on it.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Which of the following is true for photon
|
(a) E = |
(b) E = |
(c) p = |
(d) E = |
Between the plates of a parallel plate condenser there is 1mm thick paper of dielectric constant 4. It is charged at 100 volt. The electric field in volt/metre between the plates of the capacitor is
|
(a) 100 |
(b) 100000 |
(c) 25000 |
(d) 4000000 |
A beam of parallel rays is brought to a focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens. The effect of this is
|
(a) The focal point shifts away from the lens by a small distance |
|
(b) The focus remains undisturbed |
|
(c) The focus shifts to infinity |
|
(d) The focal point shifts towards the lens by a small distance |
A piece of cloud having area 25
and electric potential of
volts. If the height of cloud is 0.75 km, then energy of electric field between earth and cloud will be
|
(a) 250 J |
(b) 750 J |
(c) 1225 J |
(d) 1475 J |
The capacitance of a metallic sphere will be 1μF, if its radius is nearly
|
(a) 9 km |
(b) 10 m |
(c) 1.11 m |
(d) 1.11 cm |