A constant current i is passed through a resistor. Taking the temperature coefficient of resistance into account, indicate which of the plots shown in figure best represents the rate of production of thermal energy in the resistor
|
(a) a |
(b) b |
(c) c |
(d) d |
(d) d
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The resistance between the terminal points A and B of the given infinitely long circuit will be
|
(a) ( |
(b) (1 - |
(c) (1 + 
|
(d) (2 +
|
In Young's double slit experiment, the fringe width is 1 
if the distance between the slit and screen is doubled and the distance between the two slit is reduced to half and wavelength is changed from 6.4 
to , 4.0 
, the value of new fringe width will be
|
(a) 0.15 |
(b) 2.0 |
(c) 1.25 |
(d) 2.5 |
Light waves producing interference have their amplitudes in the ratio 3 : 2. The intensity ratio of maximum and minimum of interference fringes is
|
(a) 36 : 1 |
(b) 9 : 4 |
(c) 25 : 1 |
(d) 6 : 4 |
3.8 days is the half-life period of a sample. After how many days, the sample will become 1/8th of the original substance
|
(a) 11.4 |
(b) 3.8 |
(c) 3 |
(d) None of these |
A 4 mF condenser is charged to 400 V and then its plates are joined through a resistance. The heat produced in the resistance is
|
(a) 0.16 J |
(b) 0.32 J |
(c) 0.64 J |
(d) 1.28 J |
In a P-N junction diode if P region is heavily doped than n region then the depletion layer is
|
(a) Greater in P region |
|
(b) Greater in N region |
|
(c) Equal in both region |
|
(d) No depletion layer is formed in this case |
5 amperes of current is passed through a metallic conductor. The charge flowing in one minute in coulombs will be
|
(a) 5 |
(b) 12 |
(c) 1/12 |
(d) 300 |
