- ACharge on sphere A will be more
- BCharge on sphere B will be more
- ✓Both will have equal charge
- DCannot be said with certainty.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
If an object is placed 10 cm infront of a concave mirror of focal length 20 cm, the image will be
|
(a) Diminished, upright, virtual |
(b) Enlarged, upright, virtual |
|
(c) Diminished, inverted, real |
(d) Enlarged, upright, real |
A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is:
An electron enters a magnetic field whose direction is perpendicular to the velocity of the electron. Then
|
(a) The speed of the electron will increase |
|
(b) The speed of the electron will decrease |
|
(c) The speed of the electron will remain the same |
|
(d) The velocity of the electron will remain the same |
A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be
|
(a) One fourth |
(b) Halved |
(c) Doubled |
(d) Four times |
The pressure exerted by an electromagnetic wave of intensity I (watts/m2) on a nonreflecting surface is [c is the velocity of light]
|
(a) Ic |
(b) |
(c) I/c |
(d) |