Explanation:
Binding energy per nucleon varies in a way that it depends on the actual value of mass number (A). As the mass number (A) increases, the binding energy also increases and reaches its maximum value of 8.7MeV for A(50-80) and for A > 100. The binding energy per nucleon decreases as A increases and the nucleus breaks into two or more atoms of roughly equal parts so as to attain stability and binding energy of mass number between 50-80.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The junction diode in the following circuit requires a minimum current of 1 mA to be above the knee point (0.7 V) of its I-V characteristic curve. The voltage across the diode is independent of current above the knee point. If VB = 5V, then the maximum value of R so that the voltage is above the knee point, will be
|
(a) 4.3 kW |
(b) 860 kW |
(c) 4.3 W |
(d) 860 W |
When N-type of semiconductor is heated
|
(a) Number of electrons increases while that of holes decreases |
|
(b) Number of holes increases while that of electrons decreases |
|
(c) Number of electrons and holes remains same |
|
(d) Number of electrons and holes increases equally |
Assertion : In Young’s double slit experiment, the fringes become indistinct if one of the slits is covered with cellophane paper.
Reason : The cellophane paper decrease the wavelength of light.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Emission spectrum of 
gas
|
(a) Is a line spectrum |
(b) Is a band spectrum |
|
(c) Is a continuous spectrum |
(d) Does not fall in the visible region |
The essential distinction between X-rays and γ - rays is that
| (a) γ- rays have smaller wavelength than X-rays |
|
(b) γ - rays emanate from nucleus while X-rays emanate from outer part of the atom |
| (c) γ- rays have greater ionizing power than X-rays |
| (d) γ- rays are more penetrating than X-rays |
To get an output 1 from the circuit shown in the figure, the input must be
|
(a) A = 0, B = 1, C = 0 |
(b) A = 1, B = 0, C = 0 |
(c) A = 1, B = 0, C = 1 |
(d) A = 1, B = 1, C = 0 |
In the following transitions, which one has higher frequency
|
(a) 3 – 2 |
(b) 4 – 3 |
(c) 4 – 2 |
(d) 3 – 1 |