Practice # 2 Current, Voltage, Resistance, Components

Front

What is Ohm's Law?

Back

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (E) across the two points and inversely proportional to the resistance (R) of the conductor. It can be expressed as I = E/R.

Front

What determines the amount of current that flows under a given voltage in a conductor?

Back

The resistance of the conductor determines the amount of current that flows under the given voltage.

Front

What is the tolerance of a resistor?

Back

The tolerance of a resistor is the percentage variation between the marked value and the actual value of the resistor.

Front

What does the schematic symbol for a power source represent?

Back

The schematic symbol for a power source represents a component that provides electrical energy to a circuit.

Front

What is the significance of power ratings in wire-wound resistors?

Back

Wire-wound resistors typically control large amounts of current and have high power ratings, indicating their ability to dissipate heat without damage.

Front

Define voltage.

Back

Voltage, also known as electric potential difference, is the measure of the electric potential energy per unit charge between two points in a circuit.

Front

What is resistance?

Back

Resistance is a measure of the opposition to the flow of electric current in a conductor, measured in ohms (Ω).

Front

What is the relationship between voltage, current, and resistance?

Back

The relationship is defined by Ohm's Law: V = I * R, where V is voltage, I is current, and R is resistance.

Front

What is a capacitor?

Back

A capacitor is a passive electrical component that stores electrical energy in an electric field, used in various applications such as filtering and energy storage.

Front

What is the function of a resistor in a circuit?

Back

A resistor limits the flow of electric current in a circuit, allowing for control of voltage and current levels.