Understanding Total Resistance in Parallel Circuits

This video tutorial explains how to calculate the total resistance of a parallel circuit using complex fractions. It introduces two equivalent formulas for total resistance and focuses on using the second formula, which involves a complex fraction. The tutorial demonstrates finding the least common denominator to simplify the expression and convert the result into a mixed number and decimal. The video concludes with a summary of the methods used.

What does the total resistance in a parallel circuit represent?

• The opposition to current flow

• The sum of all resistances

• The power consumed by the circuit

• The voltage across the circuit

Which formula involves complex fractions for calculating total resistance?

• Neither formula

• Both formulas

• The second formula

• The first formula

What is the least common denominator of 15 and 20?

• 60

• 45

• 30

• 75

How do you express the total resistance as an improper fraction?

• 4/7

• 8/4

• 7/60

• 60/7

What is the mixed number form of the total resistance?

• 8 and 6/7

• 8 and 5/7

• 8 and 4/7

• 8 and 3/7

How many sevens are there in 60 when converting to a mixed number?

• 6

• 7

• 8

• 9

What is the decimal approximation of 4/7?

• 0.57

• 0.56

• 0.55

• 0.54

To how many decimal places is the total resistance rounded?

• One

• Two

• Three

• Four

What is the approximate decimal value of the total resistance?

• 8.56

• 8.57

• 8.58

• 8.55

Which symbol is used to indicate rounding in the decimal conversion?

• Equal sign

• Approximation symbol

• Greater than symbol

• Less than symbol