Resistivity & Resistance

Resistivity & Resistance

Essential Question

1. What's the relationship between resistance, resistivity, and surface area of a wire?

H.P.3E.3 Use mathematical and computational thinking to analyze problems dealing with current, electric potential, resistance, and electric charge.

Multiple Choice

What is resistance measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Multiple Choice

What is current measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Multiple Choice

What is voltage measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

Multiple Choice

If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor

• 2.1 Amps
• 2.4 Amps
• 1.71 Amps
• 15 Amps

Open Ended

What's your good thing for today OR what's something you're grateful for?

Let's take a look at a simulation!

Multiple Choice

Which of the following groups of materials are listed in

order of best conductor to worst conductor?

• iron, copper, silver

• iron, platinum, mercury

• tungsten, aluminum, nichrome

• platinum, gold, copper

Multiple Choice

What is the resistance of a 2 m long copper wire with

a cross-sectional area of 0.2 mm²?

p(Cu) = 1.68 x 10^-8

• 0.08 Ω

• 0.12 Ω

• 0.17 Ω

• 0.27 Ω

Multiple Choice

The following resistors are made of the same

material. Rank them from greatest resistance to

least resistance.

• Rx > Rw > Rz > Ry

• Rz > Ry > Rx > Rw

• Ry > Rz > Rw > Rx

• Ry > Rw > Rz > Rx

Multiple Choice

What diameter of 100 m long copper wire would

have a resistance of 0.10 Ω?

p_(Cu) = 1.68 x 10^-8

• 2.2 mm

• 3.7 mm

• 4.6 mm

• 5.4 mm

Multiple Choice

The length of a copper wire is cut in half. By what

factor does the resistance change ?

• 1/4

• 1/2

• 2

• 4