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How do you calculate equivalent resistance for resistors in series?

Add the individual resistances directly: Req, s = R1 + R2 + R3 + ...

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How do you calculate equivalent resistance for resistors in series?

Add the individual resistances directly: Req, s = R1 + R2 + R3 + ...

How do you calculate equivalent resistance for resistors in parallel?

Use the reciprocal method: 1/Req, p = 1/R1 + 1/R2 + 1/R3 + ... Then, take the reciprocal of the sum.

How to calculate the terminal voltage of a battery?

Use the formula: ΔVterminal = ε - Ir, where ε is the EMF, I is the current, and r is the internal resistance.

Describe the steps to simplify a compound circuit to find total current.

  1. Calculate equivalent resistance. 2. Use Ohm's Law (V=IR) to find the total current.

Describe how to use an ammeter to measure current.

Connect the ammeter in series with the component you want to measure.

Describe how to use a voltmeter to measure voltage.

Connect the voltmeter in parallel with the component you want to measure.

What is Equivalent Resistance?

The total resistance of a circuit or a part of a circuit, simplified into one effective resistor.

What is Electromotive Force (ε)?

The potential difference a battery provides when no current is flowing; the battery's ideal voltage.

What is Terminal Voltage?

The actual voltage measured across a battery's terminals when current is flowing, which is less than the EMF due to internal resistance.

What is an Ammeter?

A device used to measure the current flowing through a specific point in a circuit.

What is a Voltmeter?

A device used to measure the potential difference (voltage) between two points in a circuit.

Define internal resistance.

The resistance within a battery that reduces the terminal voltage when current flows.

What is the effect of adding resistors in parallel to a circuit?

Decreases the overall equivalent resistance.

What is the effect of internal resistance on a battery's terminal voltage?

It causes the terminal voltage to be less than the EMF when current flows.

What is the effect of a nonideal ammeter on the current in a circuit?

Its resistance increases the total series resistance, potentially reducing the current.

What is the effect of a nonideal voltmeter on voltage measurement?

Its finite resistance can draw some current, altering the voltage reading.

What happens to terminal voltage as current increases in a real battery?

Terminal voltage decreases.