Waves — Physics STD 11 Science — Question

An illuminated object is placed on the principal axis of a converging lens so that a real image is formed on the other side of the lens. If the object is shifted a little,

Read each statement below carefully and state, with reasons, if it is true or false: The net acceleration of a particle in circular motion is always along the radius of the circle towards the centre.

Who proposed the wave theory of light?

Are all dimensionally correct equations numerically correct? Give one example.

Find the dimensional formulae of (i) Kinetic energy and (ii) Pressure.

On pressing a solid the potential energy of atoms would increase or decrease? Also on stretching (pulling) a wire?

In place of a wire, another wire of same length and same material but double the diameter is suspended. What would be the effect on the maximum weight it bears?

The weight hanging from the sonometer wire is increased by a factor of weight. Will the frequencies of the wire increase by exactly a factor of two? Explain your answer.

Which speed is measured by speedometer of your scooter?

What is the efficiency of a Carnot engine operating between boiling and freezing points of water?