Misc.
What the Ohms Law Formula?
V=IR
Voltage = Current x Resistance
This "Father of His Country" led the Continental Army during the American Revolution before becoming the first U.S. president.
George Washington
A 6 A current flows through a 2 Ω resistor. What is the voltage drop?
12V
A circuit has a 12 V battery and a current of 3 A. What is the resistance?
4Ω
A 9 V battery is connected to a 3 Ω resistor. What is the current?
3A
This gas, essential for photosynthesis, makes up about 21% of Earth's atmosphere.
Oxygen
Two resistors (5 Ω and 10 Ω) are in series with a 30 V battery. What is the voltage across the 10 Ω resistor?
20V
Two resistors (3 Ω and 6 Ω) are in series. What is the total resistance?
9Ω
Two resistors (8 Ω and 8 Ω) are in parallel with a 16 V battery. What is the total current?
4A
Two bulbs in a circuit are lit, one is removed; resulting in the other bulb staying lit. How is this circuit wired?
The circuit is wired in parallel
This 19th-century novelist wrote Great Expectations and A Tale of Two Cities, often depicting social injustice.
Charles Dickens
A 24 V battery is connected to three resistors in parallel (2 Ω, 4 Ω, 8 Ω). What is the voltage across each resistor?
In parallel, voltage is the same across all → 24 V
Three resistors (4 Ω, 4 Ω, and 8 Ω) are in parallel. Find the total resistance.
1.6Ω
A 20 V battery is connected to a series-parallel circuit:
5 Ω in series with a parallel pair (10 Ω and 10 Ω).
Find the total current.*
2A
Group A consist of resistors: A, B, C, D
Group B consists of resistors: E, F
If any resistor in group A goes out the rest remain lit. If both E and F go out, group A goes out.
How is the group B wired relative to group A?
Group B is wired in series to group A.
This 1985 film featured time-traveling teenager Marty McFly and a DeLorean car modified by Doc Brown.
Back to the Future
In a circuit, a 9 V battery is connected to a series combination of a 3 Ω resistor and a parallel pair (6 Ω and 6 Ω). What is the voltage across one of the 6 Ω resistors?
4.5V
A 5 Ω resistor is in series with a parallel combination of 10 Ω and 10 Ω. What is the total resistance?
10Ω
In a circuit with a 6 V battery, a 2 Ω resistor is in series with two parallel resistors (4 Ω and 4 Ω). What is the current through one of the 4 Ω resistors?
0.75A per 4 Ω resistor.
In which way do electrons actually travel?
Electrons travel from negative to positive.
This landlocked country in South America, home to the world's highest capital city (La Paz), is named after a famous revolutionary leader.
Simón Bolívar
*Using Kirchhoff’s Voltage Law, find V1V1 in a loop where:
A 12 V battery is followed by V1V1, a 2 Ω resistor with 3 A current, and a 5 V drop across another component.*
1V
Find the equivalent resistance between points A and B in a circuit where:
A 2 Ω and 4 Ω resistor are in parallel.
Their combination is in series with a 3 Ω resistor.*
4.33Ω
Using Kirchhoff’s Current Law, find I3I3 at a junction where I1=5 AI1=5A enters and I2=2 AI2=2A exits.