Electric Current and Conductor Properties

What is the effect of establishing a constant, steady electric field inside a conductor?

The drift velocity of a particle represents the average speed at which the particle travels through a conductor.

According to convention, what type of charge movement defines the direction of current?

The direction of conventional current is the same as the direction of the ______ field.

Match the scenario with the expected motion of charges:

Two geometrically similar objects are connected to the same potential difference. What could cause them to yield different currents?

Resistivity is a property of an object, while resistance is a property of a material.

What is the state of the electric field within a conductor under electrostatic conditions?

What is the SI unit for resistance, and what symbol represents it?

In electrostatic situations, electrons within a conductor exhibit a net flow of charge in a specific direction.

What is the primary characteristic of electron motion in a conductor when no electric field is applied?

The relationship between voltage (V), current (I), and resistance (R) is defined by Ohm's Law: V = I * ______

Which of the following describes the function of a resistor in a circuit?

Under electrostatic conditions within a conductor, the electric field equals ______.

How does establishing a constant, steady electric field inside a conductor influence the movement of charges?

The motion of charges within a conductor is always consistent, regardless of the external conditions.

What term describes the motion of charge from one region to another?

Match the condition to the behavior of electrons:

According to Ohm's Law, what relationship exists between current and potential difference in a device?

The resistivity of a material depends on its size and shape.

What two primary factors influence the resistivity of a real object?

Ohm's Law states that the current through a device is ________ proportional to the potential difference applied to the device.

If the temperature of a conductor increases, what generally happens to its resistivity?

Match the material type with how it relates to Ohm's Law:

A copper wire has a cross-sectional area of 1.31 $mm^2$ and a resistivity of 1.69 × 10−8 [$\Omega \cdot m$]. If its length is doubled, what happens to its resistance?

Ohm's Law is a fundamental law of nature that applies universally to all materials and under all conditions.

What change would cause the resistance of a conductor to quadruple, assuming its resistivity remains constant?

If a conductor's resistivity increases due to a change in temperature but its physical dimensions (length and cross-sectional area) remain constant, its resistance will decrease.

A cylindrical wire has a length of 2 meters and a cross-sectional area of $4 \times 10^{-6} m^2$. If the wire's resistance is 0.1 Ohms, what is its resistivity in Ohm-meters?

According to the formula $R = \frac{\rho L}{A}$, resistance is directly proportional to the ______ and inversely proportional to the cross-sectional area.

Match the following factors with their effect on the resistance of a conductor:

If the current ($I$) through a conductor increases while the cross-sectional area ($A$) remains constant, what happens to the electric field ($E$) according to the relation $E = \frac{\rho I}{A}$?

The potential difference ($\Delta V$) across a conductor is independent of the electric field ($E$) within it.

Using the formula $R = \frac{\rho L}{A}$, if a wire's length is doubled and its cross-sectional area is halved, by what factor does its resistance change?

The relationship between electric field (E) and current density (J) is given by E = ______J, where the blank represents the material's resistivity.

Match the following terms with their corresponding formulas:

A conductor has a resistivity of $\rho$. If both its length $L$ and cross-sectional area $A$ are doubled, what happens to its resistance $R$?

If the potential difference across a resistor is doubled while the resistance remains constant, the current through it will be halved.

A wire with a resistance of 2 ohms has a potential difference of 4 volts applied across it. What is the current flowing through the wire, according to the formula $R = \frac{V}{I}$?

Which of the following changes will always result in a decrease in the resistance of a metallic conductor?

The formula linking potential difference (V), electric field (E), and length (L) is V = ______.