Characteristics of Parallel & Series Circuits
Voltage is constant
Parallel Circuits
A parallel circuit has a 7.5v potential difference and 3 resistors having 2.5-ohm, 3.0-ohm and 5.0-ohm resistance. What is the overall resistance in the circuit?
1.07 Ohms
In a series circuit, if one resistor burns out, what happens to the current in the circuit?
The current stops completely
A 20V battery is connected to resistors of 10Ω and 20Ω in parallel. Find the total resistance
6.67 Ohms
Material containing electrons or charged ions that can move easily through it.
Conductor
The current adds I=I 1+I 2+I 3+….
Parallel Circuit
If the voltage across a resistor is 10 V and the current is 2 Amps, what is the resistance?
5 Ohms
In a series circuit, if the total voltage is 24 V and the resistors are 8 ohms and 4 ohms, what is the current?
2.0 A
In a series circuit, what will adding a bulb do to the total resistnace of the circuit?
Increase
Material in which electrons cannot move easily.
Insulator
Resistance adds RT=R1+R2+R3+….
Series Cuircuits
In a parallel circuit, a 10V battery is connected to two resistors: 4Ω and 6Ω. What is the total resistance and the power consumed by the circuit? I = V/R P = IV
41.67
In the ticket gate analogy, what do the people represent?
Individual charges
What is the rule for voltage in series?
The voltage supplied by the battery is shared entierly amongst the components (Rtotal = sum (R1+...+Rn)
All of these are electrical insulators (5 things)
Wood, glass, rubber, ceramic and oil, plastic, fabric
Only one path (electron has no choices, must go through all components)
Series Circuits
A heating coil has a resistance of 4.0 Ω and operates on 120 V. What is the current in the coil while it is operating?
30 Amp
If the total resistance in a circuit is 5 ohms and the total voltage is 15 V, what is the current?
3 A
In a parallel circuit with two resistors of 3 Ω and 6 Ω, and a 12 V battery, what is the total current in teh circuit?
6A
All of these are conductors (3 things)
Silver, copper, gold, steel and salt water.
1/R = (1/R1 + 1/R2 + 1/R3 +...)^-1
Parallel Circuits
Determine the overall resistance of a parallel circuit with three branches each containing a resistors of 2.0Ω, 1.0Ω and 4.0Ω and a potential of 12V.
0.571 Ohm's
An electric kettle with 50-Ω heat element is powered by a 230-V wall outlet. The current flowing through kettle is
4.6 A
If a 10 V battery is connected to a 5 Ω resistor in a series circuit, what is the current in teh circuit?
2A
Which type of circuit would you choose if you want to ensure that if one component fails, the other components continue to operate?
Parallel Circuits