Capacitor || Class 11 Physics || Note


Learning Outcomes
22.1 capacitance and capacitor 
a. Show understanding of the uses of capacitors in simple electrical circuits 
b. Define capacitance as the ratio of the change in an electric charge in a system to the corresponding change in its electric potential and associate it to the ability of a system to store charge 
c. Use C=Q/V 
d. Relate capacitance to the gradient of potential-charge graph 
22.2  Parallel  plate capacitor   
a. Derive �, using  Gauss  law  and � , for parallel plate capacitor 
b.  Explain the  effect  on the capacitance of parallel plate capacitor of changing the surface area and separation  of the  plates 
c. Explain the  effect of a dielectric in a parallel plate capacitor in  
22.3  Combination  of capacitors    
a. Derive formula  for combined capacitance for capacitors in series combinations 
b.  Solve problems related  to  capacitors in  series combinations 
c. Derive formula  for combined capacitance for capacitors in parallel combinations 
d.  Solve problems related  to  capacitors in  parallel combinations 
22.4  Energy  stored in  a  charged capacitor a. Deduce, from  the area under the potential-charge graph, the equations ��щand hence  ��щ for the average electrical energy of charged capacitor 22.5 Effect of dielectric 
b.  Show understanding  of a  dielectric as a material that polarizes when subjected  to electric field 
c. Explain  the effect of inserting dielectric between the  plates of  a parallel plate capacitor on  its capacitance 

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