Physics 202 Test 1
The resistivity ρ is proportional to the resistance R of a wire.
T
While maintaining a constant voltage V, the current I increases when the cross-sectional area A of a wire expands.
T
While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire decreases.
T
resistors connected in______ must have the same voltage, whereas resistors connected in series must have the same ______ flowing through each one
parallel,current
U0 (mu knot) =
permeability of a vacuum (4pi x 10^-7)
The potential energy of a negative charge moved towards the negative plate will increase or decrease?
increase
Electric current flowing in a straight wire create magnetic fields that _______ around the wire.
Circle around.
Force on a Wire
F=BI(l)sintheta F=q(deltax/deltat)B
The resistance is inversely proportional to the length of the wire L.
False
F=qvBsin(theta)
Magnetic Force on Moving Charges
Current flowing in a loop creates a magnetic field ___________.
Through the loop
The resistance is inversely proportional to the cross-sectional area A of the wire.
True
While maintaining a constant voltage V, the current I decreases when the length L of a wire increases.
True
While maintaining a constant voltage V, the current I increases when the resistivity ρ of a wire decreases.
True
While maintaining a constant voltage V, the current I decreases when the resistivity ρ of a wire decreases.
True.
The kinetic energy of a negative charge moved towards the negative plate will increase or decrease?
decrease
