Circuits

Question 1

A parallel circuit:

3 rules about series circuits

Answer 1

• one which all the elements are connected in parallel, one element parallel to another.

1. Potential difference (V) is the same
2. Current intensity (A) is different across different elements
3. Total resistance is the sum of all the resistance ciruits

Question 2

• Finding total current I_t (parallel)

1. Rule
2. Ohm’s Law

• Finding total current V_t
  1. Ohm’s Law
• Finding total resistance R_t

1. ​Rule
2. Ohm’s Law

Answer 2

• I_T

1. _​I₁₊I₂₊I₃
2. IT=VT/RT, I=V₁ / R₁

• _​VT

1. ​VT=V1=V2=V3
2. V=(I)(R)

• RT

1. 1/RT= 1/R1+1/R2+1/R3
2. R+V/I

Question 3

3 steps for solving circuit problems (parallel)

Answer 3

1. Label all V’s, I’s and R’s VT IS THE VALUE AT THE BATTERY
2. Find VT,RT or IT using the rule or Ohm’s law
3. Apply all the rues for series circuits to find what the questions asks of you

Question 4

Calculatng the resistance in a parallel circuit on a calculator

Answer 4

1/(1/R1=1/R2+1/R3)

Question 5

A series circuit:

1. 3 rules about series circuits

Answer 5

• a circuit that in which the elements are connected end to end

1. Current intensity (A) is the same throughout
2. Potential Difference (V) is difference across different elements
3. Total resistance is the sum of all the resistance in the circuit

Question 6

• Find current intensity IT in series

1. Rule
2. Ohm’s Law

• Find total voltage VT (rule and ohm’s law)
• Find total resistance (or req) (rule and ohm’s law)

Answer 6

• IT

1. IT=I1+I2+I3
2. IT=VT/RT

• VT

1. VT=V1+V2+V3
2. V=IR

• RT

1. RT=R1+R2+R3
2. R=V/I

Question 7

3 steps in solving series circuit problems

Answer 7

1. label all of the V’S,I’S and R’s on the diagram for each element VT is the value at the battery
2. Find VT,RT or IT if possible uisng the rule or Ohm’s Law
3. Apply the rules for series circuits to find the questions asked of you