The metal used to make lightning conductors is
1). Iron
2). Aluminum
3). Copper
4). Zinc
1. Air pollution by "Fly ash" is caused?by:
2. The Capacity of a communication channel is measured in
3. Magnetism in materials is due to
4. Transformer is a device to convert
5. Decibel is the unit used for
7. The dimension MLT–2 corresponds to
8. A parachute descends slowly whereas a stone dropped from the same Height falls rapidly because