Electrodynamics

It refers to the amount of charge passing through any point in a conductor per unit time.

• Electric current

• Voltage

• Resistance

• Power

Tags

NGSS.HS-PS3-5

The current in a light bulb is 0.835 A. How long does it take for a total charge of 1.67 C to pass a point in the wire?

• 0.500 s

• 0.500 s

• 1.00 s

• 2.00 s

It refers to the opposition a material offers to the flow of charges through it.

• Electric current

• Voltage

• Resistance

• Power

Which of the following correctly relates the resistivity, 𝜌, of a substance to the resistance of an object with a length, L, that is made of the substance if the object has a cross sectional area, A, and a resistance, R?

Which of the following factors affecting resistance is inversely proportional with it?

• length

• temperature

• kind of material

• cross-sectional area

It is the work done in moving a unit of positive electric charge from one point to another.

• Electric current

• Potential Difference

• Resistance

• Power

It is the potential difference across the terminals of a cell when no current is flowing.

• Electric current

• Resistance

• Terminal voltage

• Electromotive force

It is the potential difference across the terminals of a cell when current flows through it.

• Electric current

• Resistance

• Terminal voltage

• Electromotive force

The emf of a cell is 1.56 V. When a current of 1.32 A flows through it, the potential difference across its terminal is 1.45 V. Find its internal resistance.