Saved Bookmarks
| 1. |
SUBJECT: SCIENCE (MCQs) PHYSICS1.ELECTRICITY 1.A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R, then the ratio R/R ispiece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R, then the ratio R/R is(a) 1/25 (b) 1/5 (c) 5 (d) 25 |
|
Answer» tion:we know that each part is connected to each other in PARALLEL ,hence the EQUIVALENT RESISTANCE can be calculated as follows:1/r=5/r+5/r+5/r+5/r+5/r=25/rR/R=25the RATIO of R/R is 25 |
|