Definitions of
Chinatown
Chinatown
For a given voltage, what happens to the current if the resistance is increased?
decreases
What is the difference between a conductor and an insulator?
A conductor allows electricity to flow through it easily, while an insulator does not.
What is the difference between a series circuit and a parallel circuit?
In a series circuit, the components are connected in a single loop, while in a parallel circuit, the components are connected in multiple branches.
What happens to the resistance of a conductor if its temperature is increased?
increases
What is the unit for resistance?
ohms
What is the formula for Ohm's Law?
V = IR)
How does the cross-sectional area of a wire affect its resistance?
As the cross-sectional area of a wire increases, its resistance decreases.
If the voltage is 10V and the resistance is 5 ohms, what is the current?
2A
What is Faraday's law of electromagnetic induction?
araday's law states that a changing magnetic field induces an electric current in a conductor.
How does the temperature of a wire affect its resistance?
As the temperature of a wire increases, its resistance increases.
What is the difference between AC and DC electricity?
AC stands for alternating current, which changes direction periodically, while DC stands for direct current, which flows in one direction only.
What is the formula for calculating the force on a current-carrying wire in a magnetic field?
F = BIL
What is the formula for calculating power in a circuit?
P = VI
What is the unit for magnetic field strength?
tesla
How does the material a wire is made of affect its resistance?
Different materials have different resistivities, which affect the resistance of a wire made from that material.
What is Lenz's law?
Lenz's law states that the direction of the induced current is such that it opposes the change that caused it.
What is a magnetic field?
A magnetic field is a region in which a magnet or a moving electric charge experiences a force.
What happens to the current if the voltage is held constant but the resistance is halved?
doubles
What is the formula for calculating the total resistance of a series circuit?
Rtotal = R1 + R2 + R3 + ...
What is the difference between a magnetic field and an electric field?
A magnetic field is produced by moving charges, while an electric field is produced by stationary charges.
What is the formula for calculating resistance?
R = V/I
What is the difference between a permanent magnet and an electromagnet?
A permanent magnet is made of a material that is naturally magnetic, while an electromagnet is made by passing an electric current through a coil of wire.
What is the formula for calculating the total resistance of a parallel circuit?
1/Rtotal = 1/R1 + 1/R2 + 1/R3 + ...
What is the formula for calculating the power dissipated by a resistor?
P = I2R
How does the strength of a magnetic field affect the force on a current-carrying wire in that field?
As the strength of a magnetic field increases, the force on a current-carrying wire in that field also increases.