Basic DC Resistor Circuits

Question 1

Describe Ohm’s law

Answer 1

Current is directly proportional to the voltage and inversely proportional to resistance

Question 2

Describe Kirchhoff’s voltage law

Answer 2

The sum of the voltage drops in a series circuit is equal to the applied voltage

Question 3

Describe Kirchhoff’s current law

Answer 3

The sum of currents entering a node is equal to the sum of currents leaving the node.

Question 4

Look at a piccy of a multimeter and name all the parts

Answer 4

LCD, MIN MAX button, HOLD button, Function selector, Amps socket, Common socket, Other socket, Backlight button, Mode button, Range

Question 5

What is the calibration procedure for a multimeter?

Answer 5

Check the label is intact, signed, within date, legible

Question 6

What is the serviceability check for a multimeter?

Answer 6

1. Check physical condition
2. Continuity test (check leads) - Ohms should be less than 0.5
3. Fuse test - red lead straight into red socket (should read less than 0.5 ohms)

Question 7

Is circuit on or off when measuring resistance, current, voltage

Answer 7

only off for resistance

Question 8

Name all the parts of a current probe

Answer 8

Transformer jaw, Jaw trigger, select button, LCD, common socket, other socket, hold button, relative button, function selector, positive polarity indicator

Question 9

What is the calibration procedure for a current probe?

Answer 9

Label -> intact, signed, within date, legible

Question 10

What are the steps of a current probe serviceability check?

Answer 10

1. Check physical condition
2. Physical operation of function selector and buttons
3. Operation of transformer jaws
4. Battery status - 40A blah

Question 11

which direction should current probe be facing

Answer 11

positive indicator towards positive terminal obvi