GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What does voltage describe?
A
how fast current can flow
B
how much current can flow
C
how much a material resists electrical flow
D
how fast a material conducts electrical flow
Explanation: 

Detailed explanation-1: -Voltage: Voltage is the measure of energy available to move electrons. It requires a gradient (more energy on one side than the other) and a conductor. The flow continues until the circuit reaches a common potential (equal charge) and there is no longer a flow of charge.

Detailed explanation-2: -Voltage describes the “pressure” that pushes electricity. The amount of voltage is indicated by a unit known as the volt (V), and higher voltages cause more electricity to flow to an electronic device.

Detailed explanation-3: -When a voltage source is connected to a circuit, the voltage will cause a uniform flow of charge carriers through that circuit called a current. In a single (one loop) circuit, the amount of current at any point is the same as the amount of current at any other point.

Detailed explanation-4: -The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. Just like voltage, resistance is a quantity relative between two points.

Detailed explanation-5: -In other words, current is the rate of flow of electric charge. Voltage, also called electromotive force, is the potential difference in charge between two points in an electrical field. In other words, voltage is the “energy per unit charge”. Current is the effect (voltage being the cause).

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