Ohm's Law
What effect does increasing resistance have on current in a circuit, according to Ohm’s Law?
Increasing resistance will decrease the current in a circuit, according to Ohm's Law.
What is the unit of electric current?
The unit of electric current is the ampere (A).
What materials are typically good conductors of electricity?
Metals like copper and aluminum are typically good conductors of electricity.
In a simple circuit, what components are usually included?
A simple circuit usually includes a power source (like a battery), conductors (wires), and a load (like a light bulb).
What is the unit of electric current?
The unit of electric current is the ampere (A).
What is static electricity?
Static electricity is the buildup of electric charge on the surface of objects, often caused by friction.
If 0.75 A of current is flowing through a circuit with a 5.5 V battery, what is the resistance of the light bulb?
7.3 Ω
What does the resistance in a circuit do?
Resistance in a circuit impedes the flow of electric current, measured in ohms (Ω).
Give an example of materials used as insulators.
Any materials made of non-metals.
What type of circuit does not have a load?
Short circuit.
What is the equation to show how current behaves in a parallel circuit?
Itotal = I1 + 12
What is a common example of static electricity in everyday life?
A common example of static electricity is the shock you feel after walking on a carpet and touching a metal doorknob.
How can you increase the current in a circuit, according to Ohm’s Law?
You can increase the current in a circuit by increasing the voltage or decreasing the resistance.
What is the abbreviation used for current?
Current is abbreviated to "I"
What type of metal do we use to conduct electricity inside our homes? What is its symbol?
Copper (Cu)
How does current behave in a series circuit?
Itotal = I1 = I2
What is the equation to show how voltage behaves in a parallel circuit?
Vtotal = V1 =V2
Name one way to produce static electricity.
One way to produce static electricity is by rubbing two different materials together, such as a balloon on your hair.
What is Ohm's Law?
Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R): V = I × R.
What is the equation used to calculate power?
P = W x I
Explain how induction works?
The movement of electrons between two metal objects that are not touching.
How does voltage behave in a series circuit?
Vtotal = V1 + V2
What is the equation to show how resistance behaves in a parallel circuit?
Two possible answers.
What subatomic particle moves during a static discharge?
An electron.
A circuit has four 1.5 V cells in series and the resistor in the circuit has a resistance of 5 Ω. What is the current in the circuit?
1.2 A
If you have 125 mA and 3000 W of power, what is the voltage of the energy source?
24,000 V
Explain how conduction works?
The movement of electrons as a result of two metal objects touching.
How does resistance behave in a series circuit?
Rtotal = R1 + R2
or
Rtotal = nR
Draw a circuit with three light bulbs and a 5 V battery.
Answer shown on board.
Describe how lightning happens.
Lightning is the result of a high energy discharge due to the separation of positive and negative ions suspend in the air and on the Earth's surface.