GCSE electric topic

Descripción

11th grade Spanish Fichas sobre GCSE electric topic, creado por iciar de yraola el 12/04/2018.
iciar de yraola
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Resumen del Recurso

Pregunta Respuesta
Power (including V) P = IV P is the power in watts, W I is the current in amperes (amps), A V is the potential differences in volts, V
Power (including E) P = E ÷ t P is the power in watts, W E is the energy transferred (or work done) in joules, J T is the time in seconds, s For example, an electric lamp transfers 500 J in 5 s. What is its power? Power = 500 ÷ 5 = 100 W
Potential difference V= E/Q, o E = V×Q E is the energy transferred in joules, J V is the potential differences in volts, V Q is the charge in coulombs, C For example, much energy is transferred when the potential difference is 120 V and the charge is 2 C? Energy transferred = 120 × 2 = 240 J
Power (including R) P = I2 R P is the power lost in the transmission lines in watts I is the current in the transmission lines in amperes R is the resistance of the transmission lines in ohms
Definition: current A flow of electrical charge
Definition: Resistance Opposition to the flow of charge
Definition: potential difference work done per unit charge
ac alternating current current which alternates direction *** electrical current that repeatedly reverses its direction
dc direct current current which does not alternate direction **** electrical current in a circuit that is in one direction only
mains electricity 230v, 50hz, ac
live wire carries alternating potential difference from the supply
neutral wire completes the circuit
current (equation) Q=It The symbol for charge is Q, it is measured in coulombs (C). The symbol for current is I, it is measured in amperes (A). The symbol for time is t, it is measured in seconds (s).
Ohm's law V=IR Potential difference (V) = current (I) x resistance (R)
Resistance of components in series R total = R1 + R2 Rtotal = combined resistance value (in ohms) R1 = value of resistance in first resistor (in ohms) R2 = value of resistance in second resistor (in ohms)
switch (open)
switch (closed)
resistor
diode
variable resistor
fuse
Light emitting diode (LED)
lamp
voltmeter
ammeter
thermistor
Light dependent resistor (LDR)
cell
battery
series circuit
parallel circuit
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