Physics Quiz: Electric Current & Power and Energy

The rate of flow of electric charges current What is the symbol for current? Unit? I, Amperes (A) In a current, how do charges move? Randomly Electric currents when connected to a potential difference, it creates a(n) _ field which creates a(n) _ force setting _ in motion electric, electrical, charges What do batteries and generators have to do to charge carriers? work/supply energy What do batteries and generators set up across a circuit? a potential difference Batteries convert what to what? chemical PE to electrical PE Generators convert what to what? mechanical energy to electrical PE Do batteries and generators give the circuit charges? no Since batteries and generators don't give the circuit charges, the just... force the charges to move in one direction *note, the electrons are already on the wire Electrons flow from (positive/negative) to (positive/negative) negative to positive The electrical force _ the electrons to/from the positive terminal and the electrons are _ to/by the negative terminal attracts, repelled Electrons move from an area of (high/low) electric potential to an area of (high/low) electric potential (AKA voltage) high, low How does the flow of current in batteries work? The negative terminal loses negative charge and eventually becomes positive. The positive terminal gains negative charge and eventually becomes neutral. Once the charges even out, there is no longer a potential difference between them, and the flow of electrons (current) stops The direction that positive charges would flow (if they did flow) conventional current, positive to negative Which way does conventional current flow? from positive to negative The direction that electrons (negative charges) would flow Actual current, negative to positive Which way does actual current flow? from negative to positive Do you know how to draw pictures of both conventional flow notation and electron/actual flow notation? yes The opposition to the flow of current in a conductor Resistance The higher the resistance, the _ current can make it through less