Question

which of the following is correct?
volts= watts x amps
amps= watts x volts
amps = watts + volts
watts = volts x amps
question 16
the shielded metal arc welding machines voltage output _ as its current _
decreases, decreases
increases, increases
increases, decreases
decreases, increases

Explanation:

Step1: Recall electrical power formula

The fundamental formula for electrical power is $P = V \times I$, where $P$ (Watts) is power, $V$ (Volts) is voltage, and $I$ (Amps) is current.

Step2: Evaluate first question options

Match the formula to the options:

• Volts= Watts x Amps: Incorrect, rearranged it would be $V=\frac{P}{I}$
• Amps= Watts x Volts: Incorrect, rearranged it would be $I=\frac{P}{V}$
• Amps = Watts + Volts: Incorrect, uses wrong operation
• Watts = Volts x Amps: Correct, matches $P = V \times I$

Step3: Recall SMAW machine characteristics

Shielded Metal Arc Welding (SMAW) machines have a drooping voltage-current characteristic: as output current (Amps) increases, the output voltage (Volts) decreases to maintain a stable arc.

Answer:

1. Watts = Volts x Amps
2. decreases, increases