True or false: circuits and sources

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A steady current requires a closed circuit.

2. Statement is true

   Yes

   Statement

   The source moves charge from lower to higher potential energy.

3. Statement is true

   No

   Statement

   A real source has zero internal resistance.

4. Statement is true

   Yes

   Statement

   The external voltage is ε R ÷ (R + r).

5. Statement is true

   No

   Statement

   Internal resistance can be ignored for accurate work.

Explanation