Electricity

Multiple Choice

This is an example of a _______ circuit

• open
• series
• parallel
• square

Multiple Choice

A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.
• B. motor.   
• C. magnet.
• D. transformer.

Multiple Choice

• A₂ = A₃
• A₂ + A₃ = A₁
• A₁ + A₂ = A₃
• A₄ = A₂ - A₃

Multiple Choice

A pathway for electricity to travel is called___________

• current
• static electrcity
• circuit
• circle

Multiple Choice

The strongest parts of the magnet are ...

• fronts

• backs

• poles

• middle

Multiple Choice

When running a current through a wire, what do the blue lines represent?

• The wire spinning

• A magnetic field that was created

• Electrons leaving

• Electricity

Open Ended

Why is it important to understand units of measurement and SI units in electrical engineering?

Multiple Choice

Which of the following best explains why force is considered a fundamental concept in physics?

• Because it involves mass and acceleration, which are essential for motion.

• Because it is only related to distance and acceleration.

• Because it is only related to weight and distance.

• Because it is only related to distance and mass.

Multiple Choice

A force of 15 Newton's causes a mass to accelerate at 5 m/s², what is the quantity of the mass?

• 300 kg

• 30 kg

• 3 kg

• 0.3 kg

Multiple Choice

What is the value of the total resistance in the parallel circuit diagram with 12Ω and 16Ω resistors connected to 110V?

• 28 ohms

• 6.86 ohms

• 1320 ohms

• 4 ohms

Multiple Choice

Which ONE of the following statements is true?

• emf, pd and voltage are measured using different unit

• current cannot flow without pd

• current actually flows from positive to negative

• voltage cannot be present without current

Multiple Choice

If a charge of 10 Coulombs passes through a circuit every 0.5 of a second, how much current is flowing?

• 5 Amperes

• 20 Amperes

• 5 Coulombs

• 20 Coulombs

Open Ended

Explain the difference between series and parallel resistor networks in terms of total resistance and current flow.

Multiple Choice

A device consists of a soft iron bar with a single coil of insulated wire wound on it. When a current flows in the coil the device acts as?

• A generator

• An Electromagnet

• A transformer

• A rectifier

Multiple Choice

What would be the effect on magnetic flux for the two equal, current-carrying conductors shown?

• The magnetic field would halve in strength, flowing in opposite directions

• The magnetic fields around each of the conductors would rotate independently

• The magnetic fields around the conductors would cancel each other out

• The magnetic field around the conductors would double in strength and flow in the same direction

Open Ended

Explain the role of a thermostat in maintaining the preset temperature of an immersion heater. Why is it preferred over other devices listed?

Open Ended

After learning about SI units, measurements, and basic electrical concepts, what is one area or concept you would like to explore further or need more clarification on?