What happens to resistance?

Exercise and reference answers

Questions

1. Question

   The wire is made twice as long

   Choices

   1. Doubles
   2. Halves
   3. Unchanged

   Correct choice

   Doubles

2. Question

   The cross-section area is doubled

   Choices

   1. Doubles
   2. Halves
   3. Unchanged

   Correct choice

   Halves

3. Question

   Only the colour of the wire changes

   Choices

   1. Doubles
   2. Halves
   3. Unchanged

   Correct choice

   Unchanged

4. Question

   The area is halved

   Choices

   1. Doubles
   2. Halves
   3. Unchanged

   Correct choice

   Doubles

Instructions

Tap what happens to resistance in each case.

Explanation