Mastering Series Circuits: Resistance Current and Power Calculations

In this video, Sijamba Jacob explains how to calculate total resistance, current, and power in a series circuit. He introduces two key formulas: voltage equals current times resistance, and power equals current times voltage. The video demonstrates calculating total resistance by adding resistors, finding current using voltage and resistance, and determining power using current and voltage. The tutorial concludes with a call to subscribe for more content.

What are the two key formulas mentioned for solving the problem in a series circuit?

• Voltage = Current + Resistance and Power = Voltage + Current

• Voltage = Current - Resistance and Power = Current - Voltage

• Voltage = Resistance / Current and Power = Voltage / Current

• Voltage = Current x Resistance and Power = Current x Voltage

How do you calculate the total resistance in a series circuit?

• Divide the total voltage by the current

• Multiply all resistors together

• Subtract the smallest resistor from the largest

• Add all resistors together

If R1 is 6 ohms and R2 is 4 ohms, what is the total resistance?

• 12 ohms

• 14 ohms

• 10 ohms

• 8 ohms

What is the unit of measurement for resistance?

• Watts

• Ohms

• Amps

• Volts

Which formula is used to find the current when voltage and resistance are known?

• Current = Voltage + Resistance

• Current = Voltage / Resistance

• Current = Voltage x Resistance

• Current = Resistance / Voltage

What is the current if the voltage is 20 volts and the total resistance is 10 ohms?

• 3 amps

• 4 amps

• 1 amp

• 2 amps

Which of the following is NOT a formula for calculating power?

• Power = Voltage + Current

• Power = Current^2 x Resistance

• Power = Voltage^2 / Resistance

• Power = Current x Voltage

What is the power if the current is 2 amps and the voltage is 20 volts?

• 20 watts

• 30 watts

• 40 watts

• 50 watts

Which formula was used to calculate power in the video?

• Power = Voltage^2 / Resistance

• Power = Current x Voltage

• Power = Voltage / Current

• Power = Current^2 x Resistance

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