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Electrical Voltage Basics Quiz

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Questions and Answers

What is the unit of electrical pressure?

Hertz
Ampere
Ohm
Volt (correct)

What is the potential difference needed to cause one amp of current to pass through one ohm of resistance?

10 volts
20 volts
1 volt (correct)
5 volts

What is the difference between Alternating Current (AC) and Direct Current (DC)?

AC is 12vdc, while DC is 110vac
AC is measured in volts, while DC is measured in ohms
AC is battery voltage, while DC is house voltage
AC is house voltage, while DC is battery voltage (correct)

What is the main purpose of measuring voltage using a multimeter?

To obtain the voltage across two points in a circuit (C) Signup and view all the answers

What precaution should be taken while measuring voltage with a multimeter?

Avoid touching the bare probe tips together to prevent a short-circuit (C) Signup and view all the answers

Which setting should be selected on the multimeter when measuring voltage?

A setting that allows for the specific voltage range being measured (C) Signup and view all the answers

What is the correct way to measure voltage using a multimeter?

Connect the multimeter in series to the circuit (D) Signup and view all the answers

What is the purpose of the attenuator in an oscilloscope probe?

To decrease the input signal (C) Signup and view all the answers

What should be done when plugging an oscilloscope into an AC outlet for safety reasons?

Use an isolating transformer (B) Signup and view all the answers

How does a multimeter ensure minimal disruption to the circuit while measuring current?

By having practically no resistance between its leads (B) Signup and view all the answers