- A11 Electrons, 11 protons and 13 neutrons.
- B11 Electrons, 13 protons and 11 neutrons.
- C11 Protons and 13 neutrons.
- D11 Protons and 13 electrons.
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Two charge + q and -q are situated at a certain distance. At the point exactly midway between them
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(a) Electric field and potential both are zero |
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(b) Electric field is zero but potential is not zero |
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(c) Electric field is not zero but potential is zero |
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(d) Neither electric field nor potential is zero |
A uniform magnetic field acts at right angles to the direction of motion of electrons. As a result, the electron moves in a circular path of radius 2 cm. If the speed of the electrons is doubled, then the radius of the circular path will be
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(a) 2.0 cm |
(b) 0.5 cm |
(c) 4.0 cm |
(d) 1.0 cm |
Wave nature of light follows because
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(a) Light rays travel in a straight line |
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(b) Light exhibits the phenomena of reflection and refraction |
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(c) Light exhibits the phenomenon of interference |
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(d) Light causes the phenomenon of photoelectric effect |