The logic behind ‘NOR’ gate is that it gives
|
(a) High output when both the inputs are low |
|
(b) Low output when both the inputs are low |
|
(c) High output when both the inputs are high |
|
(d) None of these |
(a) High output when both the inputs are low
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Kirchhoff's second law is based on the law of conservation of
|
(a) Charge |
(b) Energy |
|
(c) Momentum |
(d) Sum of mass and energy |
The distance between the body centred atom and a corner atom in sodium (a = 4.225 Å) is
|
(a) 3.66 Å |
(b) 3.17 Å |
(c) 2.99 Å |
(d) 2.54 Å |
Antiparticle of electron is
|
(a) |
(b) |
(c) Positron |
(d) Neutrino |
Why are red coloured lights are used in traffic signals to stop the vehicles?
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is
|
(a) No point where electric field is zero |
|
(b) Only one point where potential is zero |
|
(c) Only one point where electric field is zero |
|
(d) a, b |
Charge on α -particle is
|
(a) |
(b) 1.6 |
(c) 3.2 |
(d) 6.4 |
The 21 cm radio wave emitted by hydrogen in interstellar space is due to the interaction called the hyperfine interaction is atomic hydrogen. the energy of the emitted wave is nearly
|
(a) |
(b) 1 Joule |
(c) 7 |
(d) |
Consider a radioactive material of half-life 1.0 minute. If one of the nuclei decays now, the next one will decay
|
(a) After 1 minute |
|
(b) After |
|
(c) After |
|
(d) After any time |
