Physics: resistors in series and parallel
Would more or less of the supply voltage be needed across a 10Ω resistor than a 4.7Ω if connected in series?
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Fill in the blanks: When two resistors are in series they are __________
One after the other
If two 10Ω resistors are connected in series what is the total resistance?
R = R1 + R2 = 10Ω + 10Ω = 20Ω
What is the formula for the total resistance of tow or more resistors in parallel?
R = V/I
Fill in the blanks: supply voltage is ________________ across the two resistors.
Divided
Fill in the blanks: in series the supply voltage ______ across the various components in the circuit
Divides
Fill in the blanks: the total resistance of two identical resistors in parallel is __________ to ___________ of the resistance of either of the individual resistors.
Equal, half
Fill in the blanks: The total resistance of a set number of resistors in series is __________ to the sum of the ________________ of each of the individual resistors
Equal, resistances
How do you work out the current?
I1 = V/R1 I2 = V/R2 I = I1 + I2
Fill in the blanks: in a supply circuit, the current is _____________ at all points
The same
Fill in the blanks: All of the supply voltage is __________ across the first and second resistor in a parallel circuit. The supply voltage ____________________ divide. The current _____________ divide
The same, does not, does
A 1Ω and a 3Ω resistor are connected in series across a 40V supply voltage. What is the p.d. across the 1Ω resistor?
V = (1/4) x 40V = 10V
Fill in the blanks: The voltage across resistor R1 is _________ and the voltage across R2 is __________
V1 and V2