1. Neutrinos are chargeless elementary particles that travel close to the speed of light.
2. Neutrinos are created in nuclear reactions of beta decay.
3. Neutrinos have a negligible, but non zero mass.
4. Trillions of Neutrinos pass through human body every second.
Which of the statements given above is/are correct?

1. Bluetooth device
2. Cordless phone
3. Microwave oven
4. Wi – Fi device
Which of the above can operate between 2.4 and 2.5 GHz range of radio frequency band?

1. The food products are not made out of hydrogenated oils.
2. The food products are not made out of animal fats/ oils.
3. The oils used are not likely to damage the cardiovascular health of the consumers.
Which of the statements given above is/are correct?

1. To produce light, a CFL uses mercury vapour’ and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than that of an LED lamp.
3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above Is/are correct?