Physics Questions

Two identical resistors, each of 10 ohm, are connected in parallel. This combination, in turn, is connected to a third resistor of 10 ohm. The equivalent resistance of the combination is ___.

Light can travel ___ km in a year.

A source maintains a current I in a resistor of resistor of resistance R. If V is the potential difference across the resistor. The electrical energy dissipated in the resistor in time is given _____

The speed of the light is maximum in

The Brownian Motion was discovered by

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

A lens has a power +2.0 D. The type of lens and its focal length will be

Which among the following is not an environment friendly mode of producing electricity?