Difference between revisions of "electric circuits basics"

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(Charge and Current)
(Charge and Current)
 
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  1 coulomb = charge transferred by 1 ampere in 1 second or  1 C = 1 A * 1 s = 6.242×10^18 protons
 
  1 coulomb = charge transferred by 1 ampere in 1 second or  1 C = 1 A * 1 s = 6.242×10^18 protons
1 amp = 1 coulomb / sec
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'''Electric current''' is the time rate of change of charge, measured in amperes (A).
 
'''Electric current''' is the time rate of change of charge, measured in amperes (A).
 +
1 amp = 1 coulomb / sec
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 +
A '''direct current (dc)''' is a current that remains constant with time. An '''alternating current (ac)''' is a current that varies sinusoidally with time.
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====Voltage====
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'''Voltage''' (or potential difference) is the energy required to move a unit charge through an element, measured in volts (V).
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Power is the rate of doing work, the amount of energy transferred per unit time. Measured in watts
  
Power is the rate of doing work, the amount of energy transferred per unit time. Measured in watts.
 
  
  
 
Energy is the capacity to do work, measured in joules (J).
 
Energy is the capacity to do work, measured in joules (J).

Latest revision as of 16:06, 30 September 2018

Contents

DC Circuits

Basic Concepts

Systems of Units

Charge and Current

Charge is an electrical property of the atomic particles of which matter consists, measured in coulombs (C).

1 coulomb = charge transferred by 1 ampere in 1 second or  1 C = 1 A * 1 s = 6.242×10^18 protons


Electric current is the time rate of change of charge, measured in amperes (A).

1 amp = 1 coulomb / sec

A direct current (dc) is a current that remains constant with time. An alternating current (ac) is a current that varies sinusoidally with time.

Voltage

Voltage (or potential difference) is the energy required to move a unit charge through an element, measured in volts (V).


Power is the rate of doing work, the amount of energy transferred per unit time. Measured in watts


Energy is the capacity to do work, measured in joules (J).