In the house, if more and more appliances will be connected in parallel, what do you think will happen? Explain. Do you think this would be a good practice? why??
2007-10-03 01:19:46 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics
More and more current is drawn. This OK as long as the current in each branch does not exceed the branch limit and total current does not exceed the house service limit.
2007-10-03 01:36:29 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋
As more loads are added to a parallel circuit, the available current will decrease. This is because it is evenly distributed to each of the loads on the parallel circuit. The voltage will remain the same however, because each appliance is individually connected to the two leads of the circuit. As the current decreases, so does the electrical power available to each appliance. As more loads are applied to the parallel circuit, the appliances requiring the most power will begin to fail. At a certain point, everything on the circuit will fail, because the current will be too low.
This applies to a circuit with a fixed voltage and current. House circuits supply constant AC voltage and the current is limited by the power rating on the fuse connecting the house circuit to the electrical grid. A 50 amp fuse can supply this amount of current before switching off. If the sum of the appliances on a parallel circuit draws more than 50 amps of current (current =watts/voltage), the fuse will trip. Voltage spikes can trip breakers on a parallel circuit which is nearly fully loaded.
2007-10-03 08:43:12 · answer #2 · answered by Roger S 7 · 1⤊ 0⤋