?A diode as a rectifier converts?
1). Ac to dc?
2). dc to ac?
3). Varying dc into constant dc
4). High voltage into low voltage and vice-versa
4. What type of force acts on a car moving around a curve?
5. A small gap is left at the joints of rails in a railway track to
6. A soap bubble shows colours when illuminated with white light. This is due to
7. The function of ball bearings in a wheel is :
8. Which among the following is a vector quantity?
9. When a light wave is reflected from a mirror, there is a change in its