Ch 28

Question 1

What is emf?

Answer 1

Is the maximum possible voltage the battery can handle

Question 2

What is the law of terminal voltage?

Answer 2

V= absl_ Ir
Ir=internal resistance

Question 3

How to find the current in the circuit?

Answer 3

I=absl/R+r

Question 4

Another way to find current

Answer 4

I=v/R

Question 5

Find the resistor in series

Answer 5

IR equalvent= IR1+IR2

Question 6

Find the resistor in parallel

Answer 6

V/R eq=V/R1+V/R2

Question 7

What is kirchoff rules?

Answer 7

The junction rule
I in=I out
The loop rule
Absl total - IR total=0

Question 8

How to find the current using kirchoff rule in parallel?

Answer 8

I=absl 1- absl2/R1+R2

Question 9

What does time constant mean?

Answer 9

The required for the charge to increase from zero to 63.2% of its maximum
Tao=RC

Question 10

How to the current if the switch was closed?

Answer 10

I=absl/R e power _t/rc

Question 11

How to find the charge if the switch was closed?

Answer 11

Q=Qfinal(1-e power -t/tao)

Question 12

How to find the maximum charge?

Answer 12

Qmax=C absl

Question 13

How to find time constant of the chatge on 1/4 of its intial value?

Answer 13

-ln4=-t/RC