Which type of raspberries produce fruit in both autumn

A plane electromagnetic wave travels in vacuum along the z-direction. If the frequency of the wave is 20 MHz, what is its wavelength?

The base of an electric iron is brightly polished mainly -

When white light passes through a glass prism, which color deviates the least?

Clear nights are colder than cloudy nights because of –

In a concave mirror which of the following pair of position of object – size of the image is correct?

I. At infinity – point sized

The experimental evidence that the electron exhibits wave-like characteristics was first provided by:

Which of the following is a reason for excessive current in electrical circuits?

I. Direct touching of wires

A spherical ball made of steel when dropped in mercury container will –

An object of mass ‘m’ be made to fall freely from a height ‘h’. At the start the potential energy is _____ and kinetic energy is ______.