Simple Circuits - AP Physics 2
Card 1 of 30
What happens to total voltage in a series circuit with identical voltage sources?
What happens to total voltage in a series circuit with identical voltage sources?
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It adds up. Voltages sum algebraically in series.
It adds up. Voltages sum algebraically in series.
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What happens to the total resistance in a series circuit when more resistors are added?
What happens to the total resistance in a series circuit when more resistors are added?
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It increases. More resistances add to total resistance.
It increases. More resistances add to total resistance.
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Find the equivalent resistance of $R_1 = 6 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in parallel.
Find the equivalent resistance of $R_1 = 6 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in parallel.
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$R_{eq} = 2 \text{Ω}$. Using parallel formula: $1/R_{eq} = 1/6 + 1/3$.
$R_{eq} = 2 \text{Ω}$. Using parallel formula: $1/R_{eq} = 1/6 + 1/3$.
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What is the voltage across each resistor in a series circuit?
What is the voltage across each resistor in a series circuit?
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It varies depending on resistance. Voltage divides proportionally by resistance.
It varies depending on resistance. Voltage divides proportionally by resistance.
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What is the current through a $12 \text{Ω}$ resistor with $24 \text{V}$ across it?
What is the current through a $12 \text{Ω}$ resistor with $24 \text{V}$ across it?
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$I = 2 \text{A}$. Using $I = V/R = 24/12$.
$I = 2 \text{A}$. Using $I = V/R = 24/12$.
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What is the unit of electrical resistance?
What is the unit of electrical resistance?
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Ohm (Ω). Named after Georg Simon Ohm.
Ohm (Ω). Named after Georg Simon Ohm.
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What type of circuit allows current to flow through multiple paths?
What type of circuit allows current to flow through multiple paths?
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Parallel Circuit. Multiple current paths available.
Parallel Circuit. Multiple current paths available.
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State Ohm's Law in terms of voltage, current, and resistance.
State Ohm's Law in terms of voltage, current, and resistance.
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$V = IR$. Voltage equals current times resistance.
$V = IR$. Voltage equals current times resistance.
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Identify the formula for electric charge.
Identify the formula for electric charge.
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$Q = It$. Charge equals current times time.
$Q = It$. Charge equals current times time.
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What happens to power if both voltage and current are doubled?
What happens to power if both voltage and current are doubled?
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Power increases fourfold. Power equals $IV$, so doubling both gives $4P$.
Power increases fourfold. Power equals $IV$, so doubling both gives $4P$.
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Calculate the total current if $I_1 = 2 \text{A}$ and $I_2 = 3 \text{A}$ in parallel.
Calculate the total current if $I_1 = 2 \text{A}$ and $I_2 = 3 \text{A}$ in parallel.
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$I_{total} = 5 \text{A}$. Simple addition of parallel currents.
$I_{total} = 5 \text{A}$. Simple addition of parallel currents.
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What is the voltage across each resistor in a parallel circuit?
What is the voltage across each resistor in a parallel circuit?
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It is the same across each resistor. All branches share same voltage source.
It is the same across each resistor. All branches share same voltage source.
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What device is used to measure electric current?
What device is used to measure electric current?
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Ammeter. Connected in series with circuit.
Ammeter. Connected in series with circuit.
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State the formula for equivalent resistance in a parallel circuit.
State the formula for equivalent resistance in a parallel circuit.
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$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \text{...} + \frac{1}{R_n}$. Reciprocal of sum of reciprocals.
$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \text{...} + \frac{1}{R_n}$. Reciprocal of sum of reciprocals.
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What is Kirchhoff's Loop Rule?
What is Kirchhoff's Loop Rule?
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Sum of potential differences in any closed loop is zero. Conservation of energy principle.
Sum of potential differences in any closed loop is zero. Conservation of energy principle.
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What is the unit of electric potential difference?
What is the unit of electric potential difference?
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Volt (V). Named after Alessandro Volta.
Volt (V). Named after Alessandro Volta.
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Find the equivalent resistance of $R_1 = 2 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in series.
Find the equivalent resistance of $R_1 = 2 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in series.
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$R_{eq} = 5 \text{Ω}$. Series resistances add: $2 + 3 = 5$.
$R_{eq} = 5 \text{Ω}$. Series resistances add: $2 + 3 = 5$.
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Calculate the power dissipated by a $4 \text{Ω}$ resistor with $2 \text{A}$ current.
Calculate the power dissipated by a $4 \text{Ω}$ resistor with $2 \text{A}$ current.
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$P = 16 \text{W}$. Using $P = I^2R = 2^2 \times 4$.
$P = 16 \text{W}$. Using $P = I^2R = 2^2 \times 4$.
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What is the total current in a parallel circuit?
What is the total current in a parallel circuit?
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Sum of currents through each branch. Kirchhoff's junction rule application.
Sum of currents through each branch. Kirchhoff's junction rule application.
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What is the voltage across each resistor in a series circuit?
What is the voltage across each resistor in a series circuit?
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It varies depending on resistance. Voltage divides proportionally by resistance.
It varies depending on resistance. Voltage divides proportionally by resistance.
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Find the equivalent resistance of $R_1 = 6 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in parallel.
Find the equivalent resistance of $R_1 = 6 \text{Ω}$ and $R_2 = 3 \text{Ω}$ in parallel.
Tap to reveal answer
$R_{eq} = 2 \text{Ω}$. Using parallel formula: $1/R_{eq} = 1/6 + 1/3$.
$R_{eq} = 2 \text{Ω}$. Using parallel formula: $1/R_{eq} = 1/6 + 1/3$.
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State the formula for equivalent resistance in a parallel circuit.
State the formula for equivalent resistance in a parallel circuit.
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$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \text{...} + \frac{1}{R_n}$. Reciprocal of sum of reciprocals.
$\frac{1}{R_{eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \text{...} + \frac{1}{R_n}$. Reciprocal of sum of reciprocals.
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What is the unit of electrical resistance?
What is the unit of electrical resistance?
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Ohm (Ω). Named after Georg Simon Ohm.
Ohm (Ω). Named after Georg Simon Ohm.
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What type of circuit allows current to flow through multiple paths?
What type of circuit allows current to flow through multiple paths?
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Parallel Circuit. Multiple current paths available.
Parallel Circuit. Multiple current paths available.
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Calculate the total current if $I_1 = 2 \text{A}$ and $I_2 = 3 \text{A}$ in parallel.
Calculate the total current if $I_1 = 2 \text{A}$ and $I_2 = 3 \text{A}$ in parallel.
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$I_{total} = 5 \text{A}$. Simple addition of parallel currents.
$I_{total} = 5 \text{A}$. Simple addition of parallel currents.
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Identify the relationship between power, current, and resistance.
Identify the relationship between power, current, and resistance.
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$P = I^2R$. Derived from $P = IV$ and $V = IR$.
$P = I^2R$. Derived from $P = IV$ and $V = IR$.
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What is the voltage across each resistor in a parallel circuit?
What is the voltage across each resistor in a parallel circuit?
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It is the same across each resistor. All branches share same voltage source.
It is the same across each resistor. All branches share same voltage source.
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What is the effect on current if voltage doubles and resistance remains constant?
What is the effect on current if voltage doubles and resistance remains constant?
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Current doubles. Current is directly proportional to voltage.
Current doubles. Current is directly proportional to voltage.
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What is the effect on resistance if the length of a resistor is doubled?
What is the effect on resistance if the length of a resistor is doubled?
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Resistance doubles. Resistance is proportional to length.
Resistance doubles. Resistance is proportional to length.
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What device is used to measure electric current?
What device is used to measure electric current?
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Ammeter. Connected in series with circuit.
Ammeter. Connected in series with circuit.
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