Flashcards
Physics: Power and Resistance
Flashcards do conjunto (8)
- 1What is voltage?Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.
- 2What is the resistance of a material dependent on?The resistance (R) of a material depends on its length, cross-sectional area, and the resistivity , a number that depends on the material:
- 3What is power?Power is the rate at which work is done.
- 41 W = ? J/s1 W = 1 J/s
- 5Which is cheaper? Power from a wall socket or power from a battery?Wall socket is much cheaper
- 6Batteries produce AC or DC currents?DC
- 7Wall sockets produce AC or DC current?AC
- 8If R= p/I^2 then what is the resistance of a 12 watts on a 3 watt current?1.33' ohm
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- Descrição
- Power is the rate at which work is done. This is an essential topic for anyone studying physics
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- PatrickNoonan
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