Physics Questions

An object of 1.2 cm height is placed 30 cm before a concave mirror of focal length of 20 cm toget a real image at a distance of 60 cm from the mirror. What is the height of the image formed?

What is the resistance (in Ω) of an electrical component if a current of 0.2 A passes through it on application of 8 V of potential difference across it?

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 of the following can do more work?

If the distance travelled by an object is zero, then the displacement of the object

The centre of the reflecting surface of a spherical mirror is a point called the ___.

Calculate the work done by the force of gravity when a satellite moves in an orbit of radius 40,000 km around the earth.

1 pascal equals 1 ________________.