Physics-
General
Easy
Question
When 
decays to become 
, the particle released is
- electron
-particle
- neutron
- positron
-particle
The correct answer is: positron
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The binding energies of a deutron and an -particle are 1.125, 7.2 MeV/nucleon respectively. The more stable of the two, is
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physics-General
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Observe the following statements regarding isotones
i) 
and 
are isotones
ii) Nuclides having different atomic numbers (z) and mass number (A) but same number of neutrons (n) are called Isotones
iii) 
are isotone
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i) and are isotones
ii) Nuclides having different atomic numbers (z) and mass number (A) but same number of neutrons (n) are called Isotones
iii) are isotone
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A current carrying loop is placed in the nonuniform magnetic field whose variation in space is shown in figure. Direction of magnetic field is into the plane of paper. the magnetic force experienced by the loop is
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physics-General
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Another straight thin wire with steady current I1 , flowing out of the plane of the paper is kept at the origin.
Due to the presence of the current I1 at the origin
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Due to the presence of the current I1 at the origin
physics-General
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The magnitude of the magnetic field (B) due to loop ABCD at the origin (O) is
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physics-General
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Physics-General
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A loop carrying current I lies in the x-y plane as shown in fig. The unit vector 
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A circular loop of radius 20cm is placed in a uniform magnetic field 
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A proton accelerated by a pd V=500 KV moves through a transverse magnetic field B=0.51 T as shown in figure. Then the angle q through which the proton deviates from the initial direction of its motion is (approximately)
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A particle of mass m and charge q, moving with velocity V enters Region II normal to the boudary as shown in fig. Region II has a uniform magnetic field B perpendicular to the plane of the paper. The length of the Region II is l . Then :
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physics-General
chemistry-
Which alkene on ozonolysis gives 
and
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chemistry-General
chemistry-
Increasing order of electrophilic substitution for following compounds
I) 
II) 
III) 
IV) 
Increasing order of electrophilic substitution for following compounds
I)
II)
III)
IV)
chemistry-General
chemistry-
product will be-
product will be-
chemistry-General
