Physics Chapter 17 Section 3 Quiz: Current and Resistance

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How are batteries and generators different?

Batteries convert chemical energy into electrical energy, and generators convert mechanical energy into electrical energy.

What is electric current?

Electric current is the rate at which electric charges pass through a given area.

What is drift velocity?

Drift velocity is the net velocity of a charge carrier moving in an electric field.

How can resistance, current, and potential difference be calculated using the definition of resistance?

Resistance, current, and potential difference can be calculated using the formula R = V/I, where R is resistance, V is potential difference, and I is current. Signup and view all the answers

What is the distinction between ohmic and non-ohmic materials?

Ohmic materials have a constant resistance, while non-ohmic materials do not have a constant resistance. Signup and view all the answers

What does the formula I = ΔQ / Δt represent?

The formula I = ΔQ / Δt represents the rate at which charge passes through a given area over a time interval. Signup and view all the answers

What formula is used to calculate the power dissipated by a resistor?

P = I^2R Signup and view all the answers

How do electric companies measure energy consumed?

In kilowatt-hours Signup and view all the answers

Why is electrical energy transferred at high potential differences?

To minimize energy loss Signup and view all the answers

What is the unit conversion for going from milli (m) to the basic unit?

Multiply by 10^-3 Signup and view all the answers

What is the unit conversion for going from Kilo (k) to the basic unit?

Multiply by 10^3 Signup and view all the answers

What is the difference between direct current and alternating current?

Direct current moves in a single direction, while alternating current's direction of charge movement continually alternates. Signup and view all the answers

How is electric power defined and what is the formula to calculate it?

Electric power is defined as the rate of conversion of electrical energy. The formula to calculate it is P = I∆V, where P is electric power, I is current, and ∆V is potential difference. Signup and view all the answers

What type of energy do batteries and generators supply to charge carriers?

Batteries supply electrical energy by converting chemical energy, while generators supply electrical energy by converting mechanical energy. Signup and view all the answers

At what potential differences is electrical energy transferred to minimize energy loss?

Electrical energy is transferred at high potential differences to minimize energy loss. Signup and view all the answers

What are the two types of current, and how do they differ?

The two types of current are direct and alternating. Direct current has charges moving in a single direction, while alternating current continually alternates the direction of charge movement. Signup and view all the answers