MCQ
The sensitivity of a tangent galvanometer can be increased by increasing:
- AThe radius of the coil
- BThe external magnetic field
- CThe number of turns of the coil
- DAll the above
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The first line in the Lyman series has wavelength l. The wavelength of the first line in Balmer series is
|
(a) |
(b) |
(c) |
(d) |
As our eyes can not retrace the bent path of light, a stick, dipped in water, appears:
Average energy stored in a pure inductance L when a current i flows through it, is
|
(a) |
(b) |
(c) |
(d) |
An atom of mass number 15 and atomic number 7 captures an α - particle and then emits a proton. The mass number and atomic number of the resulting product will respectively be
|
(a) 14 and 2 |
(b) 15 and 3 |
(c) 16 and 4 |
(d) 18 and 8 |
The phenomenon of diffraction of light was discovered by
|
(a) Hygens |
(b) Newton |
(c) Fresnel |
(d) Grimaldi |