Explanation:
12C and 14C are the two isotopes of carbon atom that have same atomic number, but different mass numbers. This means that they have same number of protons and electrons, but different number of neutrons. Therefore, 12C has 6 protons, 6 electrons and 6 neutrons, whereas 14C has 6 electrons, 6 protons and 8 neutrons.
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An alpha particle is accelerated through a potential difference of 
. Its kinetic energy will be
|
(a) 1 MeV |
(b) 2 MeV |
(c) 4 MeV |
(d) 8 MeV |
A TV tower has a height of 100 m. The average population density around the tower is 1000 per km2. The radius of the earth is 6.4 
m. the population covered by the tower is
|
(a) 2 |
(b) 3 |
(c) 4 |
(d) 6 |
The total current supplied to the circuit by the battery is
|
(a) 1 A |
(b) 2 A |
(c) 4 A |
(d) 6 A |
In the Young's double slit experiment, if the phase difference between the two waves interfering at a point is ∅, the intensity at that point can be expressed by the expression (Where A and B depend upon the amplitudes of the two waves)
|
(a) I = |
(b) I = |
(c) I = A + Bcos |
(d) I = A + B Cos∅ |
An oscillator circuit consists of an inductance of 0.5mH and a capacitor of 20 μF. The resonant frequency of the circuit is nearly
|
(a) 15.92 Hz |
(b) 159.2 Hz |
(c) 1592 Hz |
(d) 15910 Hz |
