Currents are the same through all components connected in series. For example if a 2V battery and a 6V battery are connected to a resistor and LED in series, the current through all the components would be same (say, 15mA) but the voltages will be different (5V across the resistor and the 3V across the LED).
This equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. In other words, if we increase the voltage, then the current will increase. But, if we increase the resistance, then the current will decrease.
Do different batteries have different currents?
It is possible to vary total voltage and current from a number of batteries by connecting them in different ways in the circuit.A standard single dry cell battery produces a voltage of 1.5 Volt, with its current dependent on the size of the cell. The bigger the cell, the bigger the current.
Why battery can have the same voltage but not energy?
It’s the same chemistry, so the voltage is the same. The amount of ENERGY in the cell is higher in a larger cell, simply because there is more material to react. If you want more voltage, you have to put them in series. So, two 1.5V cells in series will give you 3V.
Does a battery always have the same current?
No, the current in a circuit is determined by the voltage applied, the voltage from the battery, and the resistance of the circuit.
Can you have voltage without current?
There can be voltage without a current; for instance if you have a single charge, that charge induces a voltage in space, even if it’s empty. Voltage, in the most physical way, is a scalar field that determines the potential energy per unit charge at every point in space.
Is voltage proportional to current?
Current is directly proportional to the voltage. A fourfold increase in the voltage would cause a fourfold increase in the current.
Why do different batteries have the same voltage?
A battery is a group of cells tied together in some configuration. So, a familiar alkaline cell will produce about 1.5V. It doesn’t matter if it’s a AAA cell or a D cell. It’s the same chemistry, so the voltage is the same.
How a circuit can have voltage resistance and current?
The relationship between current, voltage and resistance is expressed by Ohm’s Law.This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant.
How does battery voltage affect current?
How does changing the battery’s voltage affect the current? The higher the battery voltage, the greater the flow of current in the circuit.
Why is voltage same in parallel circuit?
The first principle to understand about parallel circuits is that the voltage is equal across all components in the circuit. This is because there are only two sets of electrically common points in a parallel circuit, and the voltage measured between sets of common points must always be the same at any given time.
Is the current the same on both sides of a battery?
As long as the potential difference is the same, there will not be change in current on either side of the resistor as the number of electrons entering and exiting the resistor is the same.
Can I use a charger that provides the same voltage but a higher amperage?
Yes, it is absolutely safe to charge a device with a charger that has more current capacity than needed. Since the voltage is held constant (5V), the only factor that determines current draw is the load (another term for resistance) the device places on the charger.
Can electric current flow in two directions?
No, you cannot have multiple currents flowing in different directions in the same wire because all real wires have resistance. It will lead to inconsistencies with respect to other considerations, such as power dissipation.
How does current flow in a circuit?
Current only flows when a circuit is complete? when there are no gaps in it. In a complete circuit, the electrons flow from the negative terminal (connection) on the power source, through the connecting wires and components, such as bulbs, and back to the positive terminal.
What is battery voltage and current?
Voltage is defined by how much energy each electron has as it moves. The voltage of a battery is defined by the elements in the positive and negative side (cathode and anode). For example, Zinc/Manganese oxide in our alkaline batteries gives us a voltage of 1.5V. Current is expressed in Amps (A).
Does voltage create current?
Voltage generates the flow of electrons (electric current) through a circuit. The specific name for the source of energy that creates the voltage to make current flow is electromotive force. This relationship between voltage and current is given by Ohm’s law.
What kills a person voltage or current?
So the main cause is the voltage and current as an effect is the killer at specific rate for specified period. Current will kill you but some amount of voltage is required to flow that current in the body breaking the human body resistance.
Can the voltage exist without current yes or no how?
Can voltage exist without current? Yes, it can.If the voltage is absent, those electrons cannot move between points in a circuit, which means that the current does not exist. However, the voltage is still present because you have a circuit with points whose electrical potential varies.
Why is current different from voltage?
The important difference between voltage and current. Voltage is the potential difference between two points in an electric field, which causes current to flow in the circuit. Current is the rate of flow of electrons is called current. Voltage is the cause of current (being an effect).
How does increasing voltage reduce current?
The relationship between Voltage, Current and Resistance forms the basis of Ohm’s law. In a linear circuit of fixed resistance, if we increase the voltage, the current goes up, and similarly, if we decrease the voltage, the current goes down.
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