Multiple Choice QuestionsChose the correct alternative A, B, C or D:
Two point charges (+e) are kept inside a large metallic cube without touching its sides. Electric flux emerging out of the cube is:
Zero
Chose the correct alternative A, B, C or D
In current electricity. Ohm’s law is obeyed by all:
solids
metals
liquids
gases
When a charged particle is projected perpendicular to a uniform magnetic field, it describes a circular path in which:
its speed remains constant
its velocity remains constant.
its velocity remains constant.
its kinetic energy increases.
Refractive index of a transparent material is:
same for all colors
maximum for violet colour.
minimum for violet colour.
maximum for red colour.
Which one of the following graphs represents variation of de Broglie wavelength (λ) of particle having linear momentum p:
Short Answer TypeIn an L-R circuit; as the switch is open the current does not come to zero at once. This is due to the induced emf (and current) which tries to delay the decay of current in the circuit. But the resistance in the circuit makes the decay faster.
The graph is shown is as below:
Switch
