What is the principle of a Life Jacket
1). It provides oxygen to a drowning person
2). It increases the volume of the person to keep him afloat
3). It decreases the volume of the person to keep him afloat
4). The person can sit on It like a raft
1. A small piece of a substance is weakly attracted by a strong magnetic field. The substance is
2. Which of the following is used in oven ?
3. ?In a healthy human eye, the focusing?is done by the
4. UV rays coming from Sun, majorly causes which cancer?
5. What is the phenomenon which established the transverse nature of light ?
7. Water drops cannot stick to the oily surface due to
8. What is the SI unit of electric current?
9. Which type of radiation has the lowest penetrating ability?