Figure shows three resistor configurations R1, R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1, R2 and R3 is P1, P2 and P3, respectively, then

Which one of the following statements is WRONG in the context of X-rays generated from a X-ray tube?

Two beams of red and violet colours are made to pass separately through a prism (angle of the prism is 60$$^\circ$$). In the position of minimum deviation, the angle of refraction will be :

An ideal gas is expanding such that PT$$^2$$ = constant. The coefficient of volume expansion of the gas is