SEMESTER 1 CHAPTER 3 ELECTRIC CIRCUIT

INTERNAL RESISTANCE

http://www.physicsclassroom.com/class/circuits/Lesson-1/Electric-Potential

KIRCHOFF'S SECOND RULE
The sum of the voltage changes along any closed loop in a circuit is zero. 

	Series Circuit	Parallel Circuit
1	Electric current has only one conducting path	Electric current has more than one conducting path
2	The amount of current flowing through each resistor is the same. The current doesn’t get divided.	The amount of current flowing through each resistor is different as the current  gets divided. I=I1+I2
3	If current in one resistor is interrupted, current in the  other resistor is also interrupted	If current in one resistor is interrupted, current in the  other resistor is  not interrupted
4	The voltage supplied by the battery is divided between the individual resistors V=V1+V2	The total battery voltage appears across each resistor

 

Question 1)

 

Question 5) Question 6)

 

Question 7)

Question 8)

 
Question 9)

Question 10)

Question 11)

Question 12)

Question 13)

Question 14)

POTENTIAL DIVIDER

The two resistor voltage divider is used often to supply a voltage different from that of an available battery or power supply. In application the output voltage depends upon the resistance of the load it drives.

 

VIDEO   https://www.khanacademy.org/science/physics/circuits-topic/circuits-resistance/v/ee-kirchhoffs-voltage-law 

 

 

Problem on kirchoffs 2 law