Which one of the following is the North Dravidian

Limonitic ore is the ore of which metal? 

Food cans are coated with tin and not with zinc because

The instrument used to measure the speed of the wind is –

The magnetic field lines around a straight current carrying conductor are

In a reverse-biased p-n junction diode, which of the following occurs as reverse voltage increases?

For a perfectly elastic collision, the coefficient of restitution (eee) is

According to a recent study, Groundwater in India is contaminated by which element?

When the heavier component in a mixture settles after water is added to it, the process is called _______.

Humans have _____ lobes in the left lung.

What type of immunity is provided by vaccination?