PAG 4.1 - Investigating Electrical Circuits

Question 1

How can you calculate the total resistance of a combination of resistors in series?

Answer 1

Rt= R1 + R2 + R3

Question 2

How can you calculate the total resistance of a parallel combination of resistors?

Answer 2

1/Rt = 1/R1 + 1/R2 + 1/R3

Question 3

What device can be used to check the resistance of a component

Answer 3

Ohmmeter or multimeter

Question 4

How can the percentage of the total voltage across a component be obtained?

Answer 4

Voltmeter can be used to measure potential difference across a component.
Divide the total voltage and multiply it by 100

Question 5

How should the total potential difference be shared across the resistor in series?

Answer 5

Potential difference should be shared in the same ratio as the resistance

Question 6

Why should the power supply voltage be kept relatively low in this experiment?

Answer 6

To reduce the heating effect of the components and reduce the risk of electrocution

Question 7

Why should the voltmeter be calibrated before carrying out the experiment?

Answer 7

Reduces the risk for systematic errors