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Which is the best physics Alevel textbook to study from ? Need help badly !
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Which is the best physics Alevel textbook to study from ? Need help badly !
question 5(b)
thanks a lot
can u please also help me in q7 part e ???
thanks a lot
can u please also help me in q7 part e ???
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Re: Physics Help here! Stuck somewhere?? Ask here!
can u help me in this part plzz
can anyone help me in this question
???
can anyone help me in this question
???
aiii - Again apply kirchoff's tsecond law.
this time they have asked for the whole circuit. i.e. E1, E2, r1, r2, R1, R2, I1 and I3 in the loop HBCDJFGH. Notice that I2 is not asked.
so first see the emf. it will be. E1-E2. Negative because the currents for both of them are flowing in opposite directions.
Applying Kirchoff's second law
E1-E2 = (I1 x (r1+R1 + R2/2) - (I3 x r2) ( R2/2 because remember I2 is also flowing for I2) and negative because E2 is in the opposite direction.
Look at the directions of the currents flowing from E2 and E1. The current from E1 is clockwise and the current flowing from E2 is anticlockwise. i.e. in totally in opposite directions. Assume the clockwise direction to be positive and anticlockwise to be negative always.thanks i want to ask few things
1. why E1-E2 WHY NOT E2 -E1 ???
2. I dont get why I3*R2/2 is -ve ???
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