Electrical Science -Energy

Multiple Choice

The ability of some materials to attract certain metals is called

• Electricity
• Magnetism
• Electromagnetism
• Atoms

Multiple Choice

What is the primary form of energy stored in a stretched rubber band?

• Chemical Energy

• Thermal Energy

• Mechanical Energy

• Potential Energy

Multiple Choice

The picture is an example of an:

• Electric circuit
• Electromagnet
• Electric nail
• Electric power cell

Multiple Choice

What is the relationship between the polar plot and the sine wave shown in the image?

• The polar plot represents the amplitude of the sine wave.

• The polar plot shows the frequency of the sine wave.

• The polar plot and sine wave are unrelated.

• The polar plot represents the phase of the sine wave.

Multiple Choice

What is the average value of a sine wave in relation to its peak value?

• Average value = 0.5 × peak

• Average value = 0.636 × peak

• Average value = peak

• Average value = 1.5 × peak

Multiple Choice

What is the relationship between the RMS value and the peak value in a sine wave?

• RMS value = 0.5 × peak

• RMS value = 0.707 × peak

• RMS value = peak

• RMS value = 1.5 × peak

Open Ended

Any questions?

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident