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Three capacitors each of capacitance 1μF are connected in parallel. To this combination, a fourth capacitor of capacitance 1μF is connected in series. The resultant capacitance of the system is
|
(a) 4μF |
(b) 2μF |
(c) |
(d) |
Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light?
A bulb has specification of one kilowatt and 250 volts, the resistance of bulb is
|
(a) 125 W |
(b) 62.5 W |
(c) 0.25 W |
(d) 625 W |
The charge on electron was discovered by
|
(a) J.J. Thomson |
(b) Neil Bohr |
(c) Millikan |
(d) Chadwick |
A point object is placed at a distance of 10 cm and its real image is formed at a distance of 20 cm from a concave mirror. If the object is moved by 0.1 cm towards the mirror, the image will shift by about
|
(a) 0.4 cm away from the mirror |
(b) 0.4 cm towards the mirror |
|
(c) 0.8 cm away from the mirror |
(d) 0.8 cm towards the mirror |
When light travels from glass to air, the incident angle is 
and the refracted angle is 
. The true relation is
|
(a) |
(b) |
(c) |
(d) Not predictable |
