A solid reflects incident light and it’s electrical conductivity decreases with temperature. The binding in this solids
|
(a) Ionic |
(b) Covalent |
(c) Metallic |
(d) Molecular |
(c) Metallic
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Which of the following pairs is an isobar
|
(a) |
(b) |
(c) |
(d) |
The voltage gain of a triode depends upon
|
(a) Filament voltage |
(b) Plate voltage |
(c) Plate resistance |
(d) Plate current |
In the connections shown in the adjoining figure, the equivalent capacity between A and B will be
|
(a) 10.8 μF |
(b) 69 μF |
(c) 15 μF |
(d) 10 μF |
A radioactive nucleus with Z protons and N neutrons emits an a-particle, 2b-particles and 2 gamma rays. The number of protons and neutrons in the nucleus left after the decay respectively, are
|
(a) Z – 3, N – 1 |
(b) Z – 2, N – 2 |
(c) Z – 1, N – 3 |
(d) Z, N – 4 |
The mass number of a nucleus is
|
(a) Always less than its atomic number |
|
(b) Always more than its atomic number |
|
(c) Always equal to its atomic number |
|
(d) Sometimes more than and sometimes equal to its atomic number |
X-rays of 
have frequency
|
(a) 3 |
(b) 3 |
(c) |
(d) |
