What is resistance?

What is resistance?

• A. Rate of charge flow
• B. A measure of voltage
• C. Opposition of electron flow
• D. Electrical energy

Answer: (C)

Resistance is the opposition to the flow of electric current in a circuit. It’s a property of a material or component that makes it harder for electrons to move, and it’s what causes some of the electrical energy to be converted to heat. According to Ohm’s law, current equals voltage divided by resistance, so for a given voltage, higher resistance means less current. Resistance depends on the material (how easily it conducts), temperature, and the physical form of the conductor (its length and cross-sectional area). The rate of charge flow is the current, not resistance, a measure of voltage is the potential difference, and electrical energy is the energy involved, not the opposition to current.

Resistance is the opposition to the flow of electric current in a circuit. It’s a property of a material or component that makes it harder for electrons to move, and it’s what causes some of the electrical energy to be converted to heat. According to Ohm’s law, current equals voltage divided by resistance, so for a given voltage, higher resistance means less current. Resistance depends on the material (how easily it conducts), temperature, and the physical form of the conductor (its length and cross-sectional area). The rate of charge flow is the current, not resistance, a measure of voltage is the potential difference, and electrical energy is the energy involved, not the opposition to current.