18. " What is the 10W charging power? It is a conversion problem between electrical power and current. To calculate current (in amperes, A), you need to know the relationship between electrical power (in watts, W) and voltage (in volts, V). The specific calculation formula is: current (A) = electric power (W)\/voltage (V)
If you know the charging power of 10W and assume A voltage of 5V, the calculated current is: Current (A) = 10W \/ 5V = 2A
Therefore, 10W of charging power at 5V voltage corresponds to a current of 2 amps.
10w charging power is 2A
The 10W charger, if it is our current commonly used mobile phone charger, should be the output current of 2a.
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Our current commonly used mobile phone charger, rated output voltage is 5 volts, according to the power formula, P=U×I, then when the output voltage is 5 volts, its power is 10 watts, then the current is 10÷5=2 amps.
The size of the current depends on the voltage and power of the electrical appliance and the power supply
Suppose the power supply voltage is 0V, then the charging power of w can be calculated using the power formula P=UI, that is, P=U*I, P is w, U is 0V, and the current size is I=0.045A
If the power supply voltage is different, the current size needs to be recalculated
If the charging power is w, the charging current needs 0.08A. The charging power is determined by the voltage and current together
According to the power formula P=UI, the current I=P\/U
can be calculated. Suppose the voltage is 0V, then w\/0V=0.08A. If the voltage changes, the current when the charging power is W will also change accordingly