Answer:
3rd answer
Explanation:
compare the total amount of time for each student
Independent variable (time) on horizontal axis (x-axis) and dependent variable (speed) on vertical axis (y-axis)
Answer:
copying another writer's work with no attempt to acknowledge that the material was found in external source is considered as a direct plagiarism.
Apply Ohm's law:
V = IR
V = potential difference, I = current, R = resistance
Resistance of a wire:
R = ρL/A
ρ = resistivity, L = length, A = cross-sectional area
Area of wire's cross-sectional area:
A = π(d/2)²
A = area, d = diameter
Substitute R:
V = IρL/A
Substitute A:
V = IρL/(π(d/2)²)
Given values:
V = 12V, I = 2.1A, L = 6.9m, d = 0.33×10⁻³m
Plug in these values and solve for ρ:
12 = 2.1ρ(6.9)/(π(0.33×10⁻³/2)²)
ρ = 7.1×10⁻⁸Ω·m
Answer:
no current
Explanation:
Current is induced in the wire if the circuit is complete and the magnetic flux linked with it also changes. Due to change in flux, an emf gets induced. Its magnitude is given by :
But in this case, a short piece of wire is not attached to anything and move it up and down in a magnetic field. It means that the circuit is not complete. It act as a open circuit. Hence, no current is induced in the wire.