The emitter-base junction of a transistor is …… biased while the collector-base junction is ……. biased
|
(a) Reverse, forward |
(b) Reverse, reverse |
(c) Forward, forward |
(d) Forward, reverse |
(d) Forward, reverse
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Five resistors are connected as shown in the diagram. The equivalent resistance between A and B is
| (a) 6 ohm | (b) 9 ohm |
(c) 12 ohm |
(d) 15 ohm |
In a certain double slit experimental arrangement interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength 6000 Å, the fringe width will be
|
(a) 0.5 mm |
(b) 1.0 mm |
(c) 1.2 mm |
(d) 1.5 mm |
A charge of magnitude 3e and mass 2m is moving in an electric field 
. The acceleration imparted to the charge is
|
(a) 2Ee/3m |
(b) 3Ee/2m |
(c) 2m/3Ee |
(d) 3m/2Ee |
The half life of a radioactive element which has only 
of its original mass left after a lapse of 60 days is
|
(a) 12 days |
(b) 32 days |
(c) 60 days |
(d) 64 days |
The focal length of a lens of refractive index $\mu$ is f. If the lens is immersed in a liquid of refractive index $\mu$ then the focal length of lens is: