Physics Questions

If I is the current through a wire and e is the charge of an electron, then the number of electrons crossing in t seconds will be given by

A force of 20 N displaces an object through 2 m and does a work of 20 J. The angle between the force and displacement is

A curved mirror where the reflecting surface is curved inwards is called a

Echocardiogram is more closely related to

An echo is returned in 3 s. What is the distance of the reflecting surface from the source, considering the speed of sound as 342 ms-1?

Which type of electromagnetic radiation has the longest wavelength?

Which of the following devices converts Chemical energy into Electrical energy?

What is the duration of the world’s shortest X–ray laser has been successfully created by the scientists?