What force push the electron through a resistance in a circuit?
a. voltage
b. inductance
c. potential
d. current
The correct answer and explanation is:
The correct answer is: a. Voltage
Explanation:
Voltage, also called electric potential difference, is the driving force that pushes electrons through a conductor or resistor in a circuit. It is measured in volts (V) and is created by a difference in electric potential between two points in the circuit. Voltage provides the energy required for electrons to move through the resistance and complete the circuit.
In a simple circuit, the voltage is typically supplied by a power source like a battery or a generator. A battery, for example, has two terminals: a positive terminal (higher potential) and a negative terminal (lower potential). This potential difference creates an electric field in the conductor, which exerts a force on the free electrons in the material, causing them to flow from the negative terminal to the positive terminal. This flow of electrons constitutes an electric current.
Resistance, measured in ohms (Ω), opposes the flow of electrons. The relationship between voltage (V), current (I), and resistance (R) is described by Ohm’s Law: V=I×RV = I \times R
This means that the current flowing through the circuit is directly proportional to the voltage and inversely proportional to the resistance. If there is no voltage, there is no force to push the electrons, and no current flows.
Other options:
- Inductance (b): Refers to the property of a circuit that opposes changes in current, but it does not push electrons.
- Potential (c): A general term for energy per charge, often synonymous with voltage but less specific.
- Current (d): The flow of electrons, not the force causing the movement.
In summary, voltage is the fundamental force responsible for pushing electrons through a resistance in a circuit. Without voltage, the circuit would not function.