Defining Resistance, Ohmic vs. Non-Ohmic and Electric Power

The video tutorial covers the definition of resistance, the difference between ohmic and non-ohmic substances, and the graphical representation of electric potential energy in circuits. It explains Ohm's Law, the role of a battery in a circuit, and how electric potential energy is converted to heat, light, and sound. The tutorial also introduces the concept of electric power, providing equations to calculate it using current, resistance, and electric potential difference.

What is the basic relationship between resistance, electric potential difference, and current?

• Resistance equals electric potential difference divided by current

• Resistance equals current times electric potential difference

• Resistance equals current divided by electric potential difference

• Resistance equals electric potential difference plus current

What is the symbol for resistance in electrical equations?

• Greek letter Alpha

• Lowercase r

• Greek letter Beta

• Capital R

What is the graphical representation of an ohmic substance?

• A parabolic curve

• A linear relationship

• A curved line

• A horizontal line

What is the term for substances that do not follow Ohm's Law?

• Un-ohmic

• Non-ohmic

• Ohmic

• Anti-ohmic

In a circuit with a battery and a light bulb, where is electric potential energy converted to other forms?

• Across the light bulb

• Across the switch

• Across the wires

• Across the battery

What types of energy does electric potential energy convert into in a light bulb?

• Heat, light, and sound

• Heat and kinetic energy

• Light and gravitational energy

• Sound and kinetic energy

How is the concept of electric potential energy in circuits similar to a roller coaster?

• Both involve energy conversion to heat and sound

• Both involve energy conversion to light

• Both involve gaining potential energy

• Both involve gaining kinetic energy

What is the definition of electric power?

• The rate at which electric potential energy is stored

• The rate at which electric potential energy is gained

• The rate at which electric potential energy is lost

• The rate at which electric potential energy is converted to heat, light, and sound

Which of the following is NOT an equation for electric power?

• Power equals current times electric potential difference

• Power equals resistance squared divided by electric potential difference

• Power equals electric potential difference squared divided by resistance

• Power equals current squared times resistance

What are the dimensions of electric power?

• Ohms per second

• Amps per volt

• Joules per second or watts

• Volts per amp