Electric Current and Circuit Analysis

The video tutorial explains electric current, its flow, and how it can be calculated using Ohm's Law. It covers the concepts of series and parallel circuits, demonstrating how to calculate current in each. The tutorial also introduces Kirchhoff's Current Law and the current divider rule, providing practical examples to illustrate these principles.

What is the current flowing through a 100 ohm resistor connected to a 9 volt battery?

• 0.09 amps

• 0.9 amps

• 9 amps

• 0.009 amps

How many milliamps are equivalent to 0.09 amps?

• 9 milliamps

• 90 milliamps

• 900 milliamps

• 9000 milliamps

What does a current of 1 amp represent in terms of electron flow?

• 6.2 x 10^18 electrons per minute

• 6.2 x 10^18 electrons per second

• 1 electron per second

• 1 coulomb per minute

What happens to the electric current if the resistance in a circuit is increased while the voltage remains constant?

• The current remains the same

• The current decreases

• The current becomes zero

• The current increases

In a series circuit with a 12 volt battery and resistors of 1 ohm, 2 ohms, and 3 ohms, what is the total current?

• 2 amps

• 1 amp

• 4 amps

• 3 amps

In a parallel circuit, what is the total current if the individual currents through three resistors are 6 amps, 4 amps, and 3 amps?

• 13 amps

• 12 amps

• 11 amps

• 10 amps

According to Kirchhoff's Current Law, what is the sum of currents entering and leaving a node?

• Always positive

• Always negative

• Equal to the voltage

• Zero

If a current of 12 amps enters a node and currents of 16 amps and 8 amps leave, what is the current entering the node?

• 16 amps

• 4 amps

• 12 amps

• 20 amps

In a current divider, if R1 is 10 ohms and R2 is 20 ohms with a total current of 12 amps, what is the current through R1?

• 10 amps

• 8 amps

• 6 amps

• 4 amps

What is the voltage across two parallel resistors if the current through one is 8 amps and the resistance is 10 ohms?

• 80 volts

• 60 volts

• 100 volts

• 40 volts