Waygrounds 18

A potential difference of 24 V is applied to a 150-Ω resistor. How much current flows through the resistor?

• 0.15 A

• 3600 A

• 6.25 A

• 0.16 A

What happens to the resistance of a resistor when the temperature is increased?

• Increases
• decreases
• stay the same
• vary randomly

The length of a certain conductor of resistance 100 is doubled and its cross-sectional area is halved. Its new resistance is

• 100

• 50

• 200

• 400

Factor which does not affect the resistance

• Type of material
• Length of material
• Mass of the material
• Area of the material

The unit to measure the resistivity of a wire is 

• ohms
• Volt 
• ohms.m
• ohms.s

the  resistance of the two conductor 

• R2 > R3
• R2 = R3
• R2 < R3
• NONE OF THE ABOVE 

A wire of uniform diameter 0.28mm and a length of 1.50m has a resistance of 45Ω. It's resistivity is

• 2.2 x 10^-8Ωm

• 36 Ωm

• 1.8 x 10^-6Ωm

• 3.4 x 10^-7Ωm

Current is...

• moving protons
• moving electrons
• measured in volts
• measured in ohms

Resistance is...

• What "slows down" electrons
• What "speeds up" electrons
• Moving electrons
• What "pushes" electrons

current is measured in....

• volts
• amps
• watts
• mph

Tags

NGSS.HS-PS2-5