Can both voltage and current be said to be large

Of course, it can be said that the size is large, but the voltage in engineering is used to say high and low.

Of course, the current is smaller, the total voltage is unchanged, the resistance becomes larger, and the current of the whole line becomes smaller; Of course, the partial voltage of each bulb becomes smaller, and the current becomes smaller.

Ohm's law applies.

Equipment: Current is the essential reason for the work of commonly used electrical appliances!

Voltage is the condition for generating current, when the circuit is open, there is voltage and no current;

When there is a short circuit, there is a current and no voltage;

For non-Ohm's law devices, such as semiconductor devices.

But voltage is not a requirement.

For example, solar cells are current-type devices, and the mechanism by which light generates current is carriers.

Ohm's law does not apply.

This content is not part of the secondary school level.

That's not either, it's just that the partial pressure of each bulb is less. The more series you have, the less voltage you divide, and the smaller the current.

There is voltage and there is not necessarily a current. But where there is a current, there must be a voltage. Because no matter how small the voltage and resistance are, a certain current can be formed.

By combining the power relationship with Ohm's law, we know that both voltage and current should be reduced.

From Ohm's law, it is known that there is no current when the voltage is infinite, and the resistance is infinite. Such as an open circuit of a voltage source. There is no current when the conductance (reciprocal resistance) is infinite. Such as superconductivity.

Actually, it's not absolutely nothing. But the order of magnitude is too high. For example, the resistance of the superconducting phenomenon is less than ten to the minus twenty-sixth power!

The total resistance in the circuit is larger, the total current is reduced, the voltage distributed to each bulb is smaller, and the bulb is darker. If there is voltage, there is not necessarily current, and if there is current, there must be voltage.

Is the voltage small, and the voltage is divided in series?

Electric current is formed by the directional movement of charged particles, and the difference in voltage causes the ions to move in a directional manner. When neither of them is a sufficient condition for the other to be subordinate.

No, it's just that charging me at a different speed.

In the learning of physics knowledge in junior high school, current and voltage are one of the knowledge points that must be learned by car friends. Therefore, it is important to have knowledge of current and voltage. Actually, there is a relationship between current and voltage.

The current is proportional to the voltage. From a physical point of view, when the resistance is constant, the current in the conductor is proportional to the voltage at both ends of the conductor; When the voltage is constant, the current in the conductor is inversely proportional to the resistance of the conductor.

In electromagnetism, the amount of electricity passing through any cross-section of a conductor per unit time is called current intensity, referred to as current, the current symbol is i, the unit is ampere (a), and the sail is referred to as "ampere".

Electrically stipulated: the direction of the directional flow of positive charge is the direction of the current. In the project, the directional flow direction of the positive charge is the current direction, and the magnitude of the current is expressed by the charge q flowing through the conductor section per unit time, which is called the current intensity.

Voltage, also known as potential difference or potential difference, is a physical quantity that measures the energy difference between a unit charge in an electrostatic field due to different electric potentials. Its magnitude is equal to the work done by a unit positive charge to move from point A to point B due to the action of an electric field force, and the direction of the voltage is specified as the direction from the high potential to the low potential.

Electricity. Flow.

The directional movement of an electric charge is called a circuit, and the current is often denoted by i. The unit of current is amperes (a), and it is also commonly used in milliamperes (ma) or microamperes (ua). When measuring, connect the ammeter in series in the circuit, and select the range where the ammeter pointer is close to the full deflection.

This prevents the current from being too high and damaging the ammeter.

The ammeter cannot be connected directly in series at both ends of the power supply. Electricity. Press.

Voltage is responsible for the formation of electric current. In circuits, voltage is often expressed by u. The unit of electricity is volt (V), and it is also commonly used as a unit of millivolt (MV) or microvolt (UV).

When measuring, connect the voltmeter in parallel in the circuit, if the voltage on the circuit cannot be estimated, you should first use a large amount to refer to the rental range, and then use the appropriate range after a rough measurement. This prevents damage to the voltmeter due to excessive voltage. The voltmeter can be connected directly in parallel at both ends of the power supply.

Collusion and reversal and the same law.

Series reversal: When a resistor changes, the electrical quantities (such as current, voltage, and actual electrical power) of the conductor directly or indirectly connected in series with it change in the opposite direction.

Parallelization: When a certain resistance changes, the electrical quantities (such as current, voltage, and actual electrical power) of the conductor directly or indirectly connected in parallel with it make the same change. Beg.

The resistance of the sliding rheostat becomes smaller, the total current becomes larger, the A indicator becomes larger, and the V becomes smaller.

There is no direct relationship between current and voltage. Under certain conditions, the higher the current, the greater the voltage. According to Ohm's law i=u r, the higher the voltage u, the greater the current i when the resistance r is constant.

According to the formula for calculating i=p u, the higher the voltage u, the smaller the current i when the power p is constant.

Series circuit features

The switch controls the entire circuit at any location, i.e. its role is independent of its location. There is only one path for the current, and the current that passes through one lamp must pass through the other. If one light goes out, the other must go out.

Advantages: In one circuit, if you want to control all the circuits, you can use a series of circuits;

Disadvantages: As long as there is a disconnection, the whole circuit becomes an open circuit, that is, the electronic components connected in series cannot work normally;

Distinction: There are no bifurcations (branches) in series circuits.

Circuit rules. (1) The current flowing through each resistor is equal because each section of the same branch in the DC circuit has the same current intensity.

2) The total voltage (series circuit = voltage at both ends) is equal to the sum of the partial voltages (voltage at both ends of each resistor), i.e. u=u1+u2+......un。This can be derived directly from the definition of voltage.

3) The total resistance is equal to the sum of the sub-resistances. Applying Ohm's law to each resistor yields u1=ir1, u2=ir2, ,......un=irn is substituted for u=u1+u2+......un and note that the currents on each resistor are equal, giving u=i(r1+r2+rn). This equation illustrates that if a resistance value is r=r1+r2+.

The resistive element of RN replaces the original series circuit with n resistors, and the current of this element will be the same as that of the original series circuit. Therefore the resistance r is called the equivalent resistance (or total resistance) of the original series resistor. Therefore, the total resistance is equal to the sum of the partial resistances.

4) The voltage distributed by each resistor is proportional to its resistance value, because ui=iri.

5) The power distributed by each resistor is proportional to its resistance value, because pi=i2ri.

6) There is a bifurcation of the parallel circuit current.

Voltage and current are two basic concepts in electricity, voltage refers to the difference in electric potential or the strength of the electric field, and electric dust flow refers to the flow of electric charges, both are different physical quantities.

In some cases, even if there is voltage, if there is no load in the circuit or the circuit is turned on, there will be no current flowing, and there will be no current.

I hope the above is helpful to you.