The heating element of an electric heater should be made of a material having
1). high specific resistance and high melting point
2). high specific resistance and low melting point
3). low specific resistance and low melting point
4). low specific resistance and high melting point
2. Electron microscope was invented by
3. A 'Market Economy' is one which
4. The layer of atmosphere used for radio wave transmission is
5. If the temperature of a place Increases suddenly the relative humidity
6. Hydraulic brakes in automobile work on
8. The sky appears blue because of