Question

A teacher asks her class "What quantity can be recorded in Volts?". Student 1 says "The potential difference across a resistor". Student 2 says "The rating of a fuse". Student 3 says "The electromotive force of a battery". Which students are correct? *

A 1 only
B 1 and 2
C 1 and 3
D 2 and 3

Answer 1

Answer:

1 and 2

Explanation:

Answer 2

Answer:C

Explanation:there are voltage drops across resistors in circuit. This voltage drops add up to the total voltage applied to the circuit, so 1 is correct.

Fuses are rated in volts and amps. The purpose of a fuse is to limit the amperage flowing through it. If this amperage is exceeded, the fuse "blows" and opens the circuit. The voltage rating on a fuse is realistically irrelevant, but they do have one. At some huge voltage the fuse may arc and no longer do its job. 2 is incorrect, it should be amps not volts.

The electromotive force is a synonym for voltage, and 3 is obviously correct also.