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unknown JTL Unit 63 Resources Quiz on Resistance, created by giannini.chambers on 22/02/2015.

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Resistance

Question 1 of 9

1

Temperature doesn't affect resistance

Select one of the following:

  • True
  • False

Explanation

Question 2 of 9

1

(Resistance x Length)/Area= Resistivity

Select one of the following:

  • True
  • False

Explanation

Question 3 of 9

1

Resistivity is the resistance between opposite faces on a 1m cube of a material

Select one of the following:

  • True
  • False

Explanation

Question 4 of 9

1

A copper wire is heated up then connected to a supply. Describe what happens to the voltage drop across the wire.

Select one of the following:

  • It increases

  • It decreases

  • It stays the same

Explanation

Question 5 of 9

1

What factors affect resistance

Select one or more of the following:

  • Length

  • Temperature

  • Frequency

  • Area

  • Time

Explanation

Question 6 of 9

1

Two resistors are in parallel. The resistance will go:

Select one or more of the following:

  • Up

  • Down

Explanation

Question 7 of 9

1

A voltage source has been applied to a resistor and a reading of 2A was found. Later it was found that the current has increased to 2.7A despite the voltage not changing.

Select one of the following:

  • The temperature increased

  • The temperature decreased

Explanation

Question 8 of 9

1

What is the formula for the temperature coefficient of resistance

Select one of the following:

  • R=Ro(1+α(T-To))

  • R=Ro(1xα(T-To))

  • Ro=R(1xα2))

  • R=Ro(αT)

Explanation

Question 9 of 9

1

Resistance=(Resistivity X Length)/Area

Select one of the following:

  • True
  • False

Explanation

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