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When the voltage at both ends of an electric appliance is 6V, the electric energy consumed in 1min is 144j, and the power of the electric appliance is resistance value
The power of electric appliance is 144 / 60 = 2.4W
The resistance value is (6 × 6) / 2.4 = 15 Ω
A series circuit is connected in series with two resistors. If the latter resistor is short circuited, the power consumption will be reduced_____
Why?
It's enlargement
Because the total voltage of the whole circuit is constant, according to the power = the square of the voltage / resistance, if a resistance is short circuited, the total resistance becomes smaller, so the power increases and the electric energy consumption increases
Does the resistance in the circuit always consume electricity?
Yes! As long as there is current through the resistance, there will be power loss
Will resistance consume electricity
Of course, many household appliances use this point to serve human beings, such as electric stove, hair dryer, electric heater and so on
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