There are several fundamental principles
that can be used to explain much about the
characleristics of electric circuits.
Electric currents consist of electrons
carrying charges. Electric charges carry
energy. I is the energy transported by these
charges that can power appliances and do
useful work. Energy is conserved; it is
neilher created nor destroyed. However,
energy can be transferred from place to
place. What one part of the system loses,
another part gains.
An electric current releases heat to the
wire in which it is traveling. A fuse is
sensitive to he heat released and will break
the circuit if the current generates too much
heat. An insulator prevents an electric current
from moving. Good insulators are rubber,
glass, a dry cloth, and dry air..
Liquids with dissolved particles will
conduct an electric current; living things that
are composed of water with dissolved
particles are, therefore, good conductors.
Why is it dangerous to replace a fuse with a wire that bypasses the fuse?
A the wire may jam in the fuse holder and the current would shut off.
B The wire may not melt and break if an unsafe current is produced.
C The meter reading may not be as accurate as it would be if a good fuse were used
D The lamps may burn so brightly that they will burn out.
E They utility company must authorize any changes to a circuit.
The correct answer is B. The fuse consists of a low melting point metal that will conduct electricity. If too much current flows through it the metal will get hot and melt. In doing so the circuit is broken, electricity quits flowing, and the associated circuit is rendered safe. A fuse is a safety device. If the fuse, designed to melt in unsafe current flows, is bypassed with a wire of unknown properties, it may not melt at all. Or it may melt way too soon. In other words the unknown wire will not be an effective fuse. You want the fuse to be able to conduct electricity as long as the conditions are safe but to shut things down under unsafe conditions.
I think it is (1)
B The wire may not melt and break if an unsafe current is produced.
Replacing a fuse with a wire that bypasses the fuse is dangerous because the wire may not have the ability to melt and break if there is an unsafe amount of current flowing through the circuit. Fuses are designed to melt and break the circuit when the current exceeds a safe level, protecting the circuit from overheating and potential fire hazards. By using a wire instead of a fuse, there is a risk of the current becoming too high, which can damage the appliances, cause electrical fires, or even result in electric shocks. So, it's definitely a good idea to stick with fuses and not get creative with wire bypasses. Safety first, folks!
The correct answer is B. The wire may not melt and break if an unsafe current is produced.
When electricity flows through a circuit, it generates heat due to the resistance in the wires. Fuses are designed to protect the circuit by melting and breaking the circuit if the current exceeds a safe level. This is important because excessive current can cause overheating, which can lead to electrical fires or damage to the equipment.
By replacing a fuse with a wire that bypasses the fuse, you eliminate this protective mechanism. The wire can conduct an unsafe amount of current without melting and breaking, thus creating a potential hazard. Without the fuse, there is no safeguard to prevent overheating or damage to the circuit or appliances connected to it.
Therefore, it is dangerous to replace a fuse with a wire because it eliminates the safety measure of the fuse breaking and increases the risk of electrical problems, such as overheating and electrical fires.