Missed Qs

Question 1

Height of magnification?

Answer 1

i / o

Question 2

Magnification equation (height and distance)

Answer 2

Hi / Ho = -Di/Do

Question 3

In power lines, what does using high voltage accomplish?

Answer 3

Reduces heat lost due to resistance:

• Power lost = I^2R
• Resistance is due to the material, cannot be adjusted
• High voltage at lower current maximizes power and minimizes heat loss

Question 4

What is the equation for electric field utilizing voltage, current, resistance, and length

Answer 4

E = (V-IR) / L