- AMixing substance of fifth group
- ✓Add substances of third group
- CMixing substances of group IV
- DSubstances of any group can be mixed
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The de-Broglie wavelength l
|
(a) is proportional to mass |
(b) is proportional to impulse |
|
(c) Inversely proportional to impulse |
(d) does not depend on impulse |
Photo cells are used for the
|
(a) Reproduction of pictures from the cinema film |
|
(b) Reproduction of sound from the cinema film |
|
(c) Automatic switching of street light |
|
(d) (b) and (c) both |
Which of these is unipolar transistor
|
(a) Point contact transistor |
(b) Field effect transistor |
| (c) PNP transistor | (d) None of these |
In the circuit as shown in the figure, the heat produced by 6 ohm resistance due to current flowing in it is 60 calorie per second. The heat generated across 3 ohm resistance per second will be
|
(a) 30 calorie |
(b) 60 calorie |
(c) 100 calorie |
(d) 120 calorie |
The energy of hydrogen atom in its ground state is – 13.6 eV. The energy of the level corresponding to the quantum number n is equal 5 is
|
(a) – 5.40 eV |
(b) – 2.72 eV |
(c) – 0.85 eV |
(d) – 0.54 eV |