During a negative beta decay
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(a) An atomic electron is ejected |
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(b) An electron which is already present within the nucleus is ejected |
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(c) A neutron in the nucleus decays emitting an electron |
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(d) A part of the binding energy is converted into electron |
(c) A neutron in the nucleus decays emitting an electron
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If a steady current of 4 amp maintained for 40 minutes, deposits 4.5 gm of zinc at the cathode and then the electro chemical equivalent will be
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(a) 51 |
(b) 28 |
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(c) 32 |
(d) 47 |
The bottom of a container filled with liquid appear slightly raised because of
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(a) Refraction |
(b) Interference |
(c) Diffraction |
(d) Reflection |
X-rays can be used to study crystal structure, if the wavelength lies in the range
| (a) 2 Å to 0.1 Å | (b) 10 Å to 5 Å | (c) 50 Å to 10 Å | (d) 100 Å to 50 Å |
The resultant capacitance between A and B in the following figure is equal to
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(a) 1 μF |
(b) 3 μF |
(c) 2 μF |
(d) 1.5 μF |
Peltier co-efficient of a thermo couple is 2 nano volts. How much heat is developed at a junction if 2.5 amp current flows for 2 minute
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(a) 6 ergs |
(b) 6 |
(c) 16 ergs |
(d) 6 |
A point source of light is placed in front of a plane mirror:
