Questions

Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?

If the angle of incidence formed on a concave mirror at a point is 30 deg then the angle of reflection will be

The Mongols under ___________ invaded Transoxiana in north-east Iran in 1219.

In 1917, Mahatma Gandhi organised a satyagraha to support the peasants of the Kheda district of _________.

If a+1a2=3,then the value of a2+1a2 will be

A square is inscribed in a quarter circle in such a way that two of its adjacent vertices on the radius are equidistant from the centre and other two vertices lie on the circumference. If the side of square is √(5/2) cm, then what is the radius (in cm) of the circle?

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

Characterized by bitterness or resentment

Select the word with the correct spelling.