3.6 DC Circuits

Question 1

What does ohms law state?

Answer 1

The amount of current flowing in a circuit made up of pure resistances is directly proportional to the voltage impressed on the circuit and inversely proportional to the total resistance of the circuit.

Question 2

Which equation is used to add many resistors together in series?

Answer 2

Rt = R1 + R2 + R3

Question 3

State Kirchoffs Voltage law.

Answer 3

The sum of each voltage drop around a closed circuit is equal to the sum of voltage supplied.

Question 4

In a parallel resistor circuit what formula is used to calculate the total current?

Answer 4

It = I1 + I2 + I3

Question 5

What formula is used to calculate total current in a series resistor circuit?

Answer 5

I = E/R (Ohms law) Used once total resistance of circuit is found.

Question 6

Kirchoffs current law states:

Answer 6

The sum of current entering a junction/ node must equal the sum exiting.

Question 7

Kirchoffs Voltage Law

Answer 7

The sum of voltage drops around a closed circuit is equal to the sum of voltage sources.

Question 8

Series aiding

Answer 8

Circuits that cause current to flow in the same directions have voltage added together and are said to be series aiding.

Question 9

When two opposing sources are inserted into a circuit current flows in the direction?

Answer 9

By the larger power source.

Question 10

The greater the internal resistance of a power supply

Answer 10

the more the connected load will affect output supply.