Day 353: MHT-CET Physics

1. A.
   diffraction as well as photoelectric effect
2. B.
   diffraction as well as reflection
3. C.
   refraction as well as interference
4. D.
   photoelectric effect

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1. A.
   Time taken by them to reach the earth's surface will be independent of the properties of their materials.
2. B.
   Insulating ball will reach the earth's surface earlier than the metal ball.
3. C.
   Both will reach the earth's surface simultaneously.
4. D.
   Metal ball will reach the earth's surface earlier than the insulating ball.

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1. A.
   $12 \times 10^{-6}\,J/s$
2. B.
   $3 \times 10^{-6}\,J/s$
3. C.
   $zero\,J/s$
4. D.
   $30 \times 10^{-6}\,J/s$

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1. A.
   Gravitational force is stronger than electrostatic force.
2. B.
   Gravitational as well as electrostatic force is always attractive.
3. C.
   Gravitational as well as electrostatic force always act along the line joining the two objects
4. D.
   Inverse square law $F \propto \frac{1}{r^2}$ is not observed by electrostatic force.

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1. A.
   both kinetic energy and momentum are conserved.
2. B.
   neither kinetic energy nor momentum is conserved.
3. C.
   momentum is conserved but kinetic energy is not conserved.
4. D.
   kinetic energy is conserved but momentum is not conserved.

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