17 Questions
According to Ohm's law, what is the relationship between the potential difference (V) and the current (I) in a conductor?
V is directly proportional to I
What is the formula that describes the relationship between the resistance (R), the length (L), the cross-sectional area (A), and the resistivity (ρ) of a conductor?
$R = \frac{\rho L}{A}$
How does the resistance of a conductor change with temperature, according to the given information?
Resistance increases linearly with temperature
What is the definition of the term 'current density' as mentioned in the text?
The uniform distribution of current in any cross-section of the conductor
According to the given information, what is the relationship between the potential difference (V) and the electric field (E) in a conductor?
$V = EL$
What is the relationship between the potential difference (V), the current (I), and the resistance (R) of a conductor, as described by Ohm's law?
$V = IR$
What is the unit of electric current?
Ampere
What is the relationship between drift velocity and electric field in a conductor?
Drift velocity is directly proportional to the electric field
Which of the following is the correct statement about the electric field within a conductor?
The electric field is zero everywhere within the conductor
Which of the following is the correct relationship between the resistivity of a conductor and its conductivity?
Resistivity and conductivity are inversely proportional
According to Ohm's law, what is the relationship between voltage, current, and resistance?
Voltage is directly proportional to current and resistance
What is the relationship between resistivity, resistance, cross-sectional area, and length of a material?
Resistivity = Resistance / (Cross-sectional area × Length)
How does the resistance of a material change with temperature?
Resistance changes with temperature according to the equation: ΔR = R × α × ΔT
Which of the following materials has the highest conductivity?
Silver
What is the primary function of a resistor in an electric circuit?
To limit the current flow in the circuit
If the temperature of a copper wire increases, what happens to its resistance?
Resistance increases
What is the relationship between conductivity and resistivity of a material?
Conductivity is inversely proportional to resistivity
Test your knowledge on calculating electrical resistivity using the formula ρ = R * A / l. This quiz covers the concepts of resistance, cross-sectional area, and length of a wire in relation to resistivity.
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