00:00:00.000 what is a capacitor well this is a 00:00:04.01000:00:04.020 capacitor but what inside of this inside 00:00:10.58000:00:10.590 of this it contains basically two pieces 00:00:13.33900:00:13.349 of conducting material like metal 00:00:16.00000:00:16.010 separated from each other with a piece 00:00:18.71000:00:18.720 of paper the paper is you so that the 00:00:22.70000:00:22.710 metal don't touch what it is useful for 00:00:28.45000:00:28.460 capacitor is useful to store charge 00:00:33.01000:00:33.020 once the battery connect the negative 00:00:36.92000:00:36.930 charge can attract it to the positive 00:00:39.97900:00:39.989 terminal of the battery of the right 00:00:42.20000:00:42.210 side and on the left side the negative 00:00:47.24000:00:47.250 charges get repelled from the negative 00:00:50.02900:00:50.039 terminal of the battery 00:00:55.36000:00:55.370 as the negative charge with the metal on 00:00:59.20000:00:59.210 the right it causes the piece of metal 00:01:02.56000:01:02.570 to be positively charged because the 00:01:06.13000:01:06.140 piece of metal has less negative and the 00:01:10.24000:01:10.250 piece of metal on the Left become 00:01:12.21000:01:12.220 negatively charged metal 00:01:18.17000:01:18.180 it is not that the both piece of metal 00:01:21.38000:01:21.390 has same magnitude of charge 00:01:28.98000:01:28.990 even if the 2-methyl are of different 00:01:31.57000:01:31.580 sizes and shape they still have to store 00:01:34.32000:01:34.330 equal and opposite amount of charge 00:01:40.26000:01:40.270 process of charge switching happen 00:01:42.81000:01:42.820 forever though negative charges on the 00:01:45.95900:01:45.969 right side attracted towards the 00:01:47.88000:01:47.890 positive terminal of the battery will 00:01:50.49000:01:50.500 also to be attracted to the positive 00:01:52.39900:01:52.409 terminal of the middle eventually the 00:02:02.16000:02:02.170 negative charges will get attracted 00:02:04.06900:02:04.079 towards the positive piece of metal just 00:02:07.44000:02:07.450 as much as they are attracted towards 00:02:11.40000:02:11.410 the positive terminal of the battery 00:02:14.20000:02:14.210 [Music] 00:02:19.78000:02:19.790 once this happened the process stops and 00:02:23.86000:02:23.870 the accumulated charge just sits there 00:02:28.05900:02:28.069 on the piece of metal 00:02:32.45000:02:32.460 the negative wants to go towards the 00:02:36.72000:02:36.730 positive as the opposite attracts but 00:02:41.97000:02:41.980 there is no path for them to get there 00:02:49.41000:02:49.420 but not all the capacitor will store 00:02:52.89900:02:52.909 same amount of charge one capacitor 00:03:01.07000:03:01.080 hooked up in a battery might store a lot 00:03:04.97000:03:04.980 of charge 00:03:10.86000:03:10.870 but another capacitor hooked up to same 00:03:14.94900:03:14.959 battery might store a little amount of 00:03:19.36000:03:19.370 charge so the capacitance of the 00:03:24.13000:03:24.140 capacitor tells how good the capacitor 00:03:27.58000:03:27.590 in storing charge 00:03:30.24000:03:30.250 a capacitor with large capacitance to a 00:03:33.45000:03:33.460 lot of charge and a small capacitance 00:03:35.85000:03:35.860 story small amount of charge 00:03:40.52000:03:40.530 so the capacitance is equal to the 00:03:45.81000:03:45.820 charge stored in a capacitor divided by 00:03:51.83000:03:51.840 the voltage across a capacitor 00:03:58.83000:03:58.840 so the electric potential is high where 00:04:04.11900:04:04.129 the positive charges and low near the 00:04:07.60000:04:07.610 negative let a battery charge of a 00:04:11.74000:04:11.750 capacitor then the voltage across the 00:04:15.55000:04:15.560 capacitor will be same as the voltage of 00:04:18.37000:04:18.380 the battery 00:04:20.80000:04:20.810 looking at the formula C equal to Q by V 00:04:25.96000:04:25.970 Q stands for coulombs and V for vote so 00:04:30.83000:04:30.840 coulombs per volt we call that different 00:04:35.14000:04:35.150 de might take more charge storing 00:04:37.97000:04:37.980 masseter the capacitance must increase 00:04:40.39000:04:40.400 when the capacitance stays thin because 00:04:43.19000:04:43.200 the charge increases the voltage across 00:04:45.86000:04:45.870 the capacitor increases which causes the 00:04:49.07000:04:49.080 ratio to stay the same the only way to 00:04:51.77000:04:51.780 change the capacitance of a capacitor is 00:04:54.32000:04:54.330 to alter the physical characteristics 00:04:55.97000:04:55.980 like making a piece of metal weaker 00:04:58.28000:04:58.290 placing them farther apart just changing 00:05:01.40000:05:01.410 the ratio is not going to change that 00:05:03.26000:05:03.270 represents the capacitance 00:05:05.31000:05:05.320
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