Questions

AC is converted into DC by a

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

Which among the following is not an environment friendly mode of producing electricity?

In the modern periodic table, which of the two periods contain 8 elements each?

In the Modern Periodic Table elements present in the same period will have the same

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Levity

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.

Rotund

In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always: