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What happens to the current in a series circuit if the resistance increases?
The current decreases (Ohm's Law).
What happens to the total resistance if you add more resistors in series?
The total resistance increases.
What happens to the total resistance if you add more resistors in parallel?
The total resistance decreases.
What happens to the power dissipated by a resistor if the voltage across it increases?
The power increases ($P = \frac{V^2}{R}$).
What happens to the current in a parallel circuit branch if the resistance of that branch increases?
The current in that branch decreases (Ohm's Law).
What are the key differences between series and parallel circuits?
Series: Same current, total resistance is the sum, voltage divides. Parallel: Same voltage, total resistance uses reciprocal, current divides.
Compare voltage in series vs. parallel circuits.
Series: Voltage is divided among components. Parallel: Voltage is the same across all components.
Compare current in series vs. parallel circuits.
Series: Current is the same through all components. Parallel: Current is divided among components.
Compare resistance calculation in series vs. parallel circuits.
Series: $R_{total} = R_1 + R_2 + R_3 ...$ Parallel: $\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} ...$
What is the definition of Resistivity ($
ho$)?
How much a material resists the flow of charge.
What is the definition of Resistance (*R*)?
The opposition to current flow in a circuit element.
What is the definition of Voltage (*V*)?
The electrical potential difference that drives current.
What is the definition of Current (*I*)?
The rate of flow of electric charge.
What is the definition of Charge (*q*)?
A fundamental property of matter that can be positive or negative.
What is the definition of Electrical Energy (*W*)?
Energy associated with electric fields and charges.
What is the definition of Electrical Power (*P*)?
The rate at which electrical energy is used or generated.