Who discovered the Ohm low???
Assertion (A): When two ends of a metallic wire are connected across the terminals of a cell, then some potential difference is set up between its ends. The direction of electrons are from positive terminal to negative terminal of the cell. Reason (R): Electrons are flowing through the conductors from its higher potential to its lower potential end.
Posted by Gurmannat Kaur 1 day, 11 hours ago
- 1 answers
(a) To construct a ray diagram, we use two rays which are so chosen that it is easy to know their directions after reflection from the mirror. List two such rays and state the path of these rays after reflection in case of concave mirrors. Use these two rays and draw ray diagram to locate the image of an object placed between pole and focus of a concave mirror. (b) A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object?
Posted by Rock Man . R 22 hours ago
- 1 answers
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