Question

In a given circuit, the supplied voltage is 1.5 volts. One resistor is 3 ohms and the other is 2 ohms. Use Ohm's law to determine the current in the circuit.

0.3 amps
1.5 amps
7.5 amps
3.3 amps

The purpose of a fuse or circuit breaker is _____.
to speed up the current
to slow down the current
to stop current that is flowing too fast
to stop current that is flowing too slow

Answer 1

No that other answer is not right they messed up and the right answer would be 0.3 I hope that this helps

Answer 2

(1) The value of the current depends upon how they are connected.

When placed in series:

The resistance would be: 3+2=5ohms.

Ohm's law is given as:

`I=(V)/(R)`

⇒
`I=(1.5)/(5)=3 ampere`

When placed in parallel:

The resistance would be:
`\frac{3{*}2}{3+2}=1.2 ohms`

Now, the current would be:

`I=(1.5)/(1.2)=1.25 ampere`

(2) The purpose of a fuse or circuit breaker is to stop current that is flowing too fast.

A fuse is wire that have low melting point when placed in a circuit. When current is moving too fast i.e. in case of over current, the heat produced melts this wire which further breaks the circuit. Similarly a circuit breaker is a switch which opens up in case of over flow of current.

Thus, a circuit breaker is then used to to stop current that is flowing too fast.