- A12 V
- ✓17 V
- C24 V
- D8.4 V
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In the nuclear reaction
what does X stand for
|
(a) An electron |
(b) A proton |
(c) A neutron |
(d) A neutrino |
Nucleus of an atom whose atomic mass is 24 consists of
|
(a) 11 electrons, 11 protons and 13 neutrons |
(b) 11 electrons, 13 protons and 11 neutrons |
|
(c) 11 protons and 13 neutrons |
(d) 11 protons and 13 electrons |
Out of the following statements which is not correct
|
(a) When unpolarised light passes through a Nicol's prism, the emergent light is elliptically polarised |
|
(b) Nicol's prism works on the principle of double refraction and total internal reflection |
|
(c) Nicol's prism can be used to produce and analyse polarised light |
|
(d) Calcite and Quartz are both doubly refracting crystals |
The number of turns in the primary coil of a transformer is 200 and the number of turns in the secondary coil is 10. If 240 volt AC is applied to the primary, the output from the secondary will be
|
(a) 48 V |
(b) 24 V |
(c) 12 V |
(d) 6 V |
1 atomic mass unit is equal to
|
(a) |
(b) |
|
(c) |
(d) |
The S.I. unit of magnetic permeability is
|
(a) |
(b) Am |
|
(c) |
(d) No unit, it is a dimensionless number |
If one starts with one curie of radioactive substance (T1/2 = 12 hrs) the activity left after a period of 1 week will be about
|
(a) 1 curie |
(b) 120 micro curie |
(c) 60 micro curie |
(d) 8 mili curie |