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310 items found for ""
- Finding effective resistance when a wire is bent into different shapes
The concepts needed to solve such questions Length increases, resistance increases and vice versa. Finding resistors in parallel and in series.
- Modification to ammeter to measure bigger current
Sensitivity of the ammeter means that how small a current the ammeter can measure. Example, if the original set up is 0.2 A per division, and the modified set up can measure up to 0.1 A per division, so we say the latter one is more sensitive as it is able to measure smaller change in the currrent.
- PP2010P1Q23 and SP2014P1Q11 - Identifying what lens, focal length and image from 2 rays
These two questions are actually the same. Q23 is from 2010 Pure Physics P1 while Q11 is from 2014 Sci Physics P1. Take a look at these 2 questions. If you are not sure, view the video below for the explanation. Answer to Q23: Option A Answer to Q11: Option D If you do not know how to answer these 2 questions, view this video and also refer to the lens summary below.
- When is there work done?
Work done W = F x d Only when there is distance moved in the direction of the force , there is work done. (i.e. look for the distance parallel to the force)
