| Q. Which instrument used for finding out wind-direction? |
| A. wind vane |
| Q. What is the product of the time period of a wave and its frequency? |
| A. Unity |
| Q. Which type of sound is produced by a bat? |
| A. Ultrasonic |
| Q. In our houses we get 220 V A.C What does the value 220 represent? |
| A. Effective voltage |
| Q. Which is the correct device for the detection of thermal radiation? |
| A. Expand more than liquids |
| Q. Activated charcoal is employed to remove colouring matter from pure substance, it work? |
| A. Adsorption |
General Knowledge Quiz Physics