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and 
ions having same kinetic energy pass through a region of space filled with uniform magnetic field B directed perpendicular to the velocity of ions. The masses of the ions 
and are respectively in the ratio 1 : 4 : 16. As a result
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(a) |
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(b) |
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(c) All ions will suffer the same deflection |
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(d) a, b |
Assertion : For the scattering of a-particles at a large angles, only the nucleus of the atom is responsible.
Reason : Nucleus is very heavy in comparison to electrons.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The fact that photons carry energy was established by
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(a) Doppler's effect |
(b) Compton's effect |
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(c) Bohr's theory |
(d) Diffraction of light |
On increasing the plate separation of a charged condenser, the energy
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(a) Increases |
(b) Decreases |
(c) Remains unchanged |
(d) Becomes zero |
