GATE Questions

---

India hold its first-ever lobal tourism mart at Vigyan Bhawan, New Delhi from september 16-18. It is modelled on the ITB Berlin, the world's largest tourism trade fair.

India successfully launched Chandrayaan1 satellite from SDSC Sriharikota, Andhra Pradesh on 22 October, 2008.

Isotopes are variations of an element that have the same charge as the original element, but a different mass, which is caused by either more/less neutrons in the nucleus.

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

Materials that usually allow electricity to pass through them are called Good conductors of electricity.

Conductors conduct electrical current very easily because of their free electrons.

Examples are :: Aluminium, Gold, Copper, Silver

Materials that do not allow or oppose electrical current & make poor conductors are called Insulators.

Examples are :: Glass, Plastic, Wood, Air,...