How to describe the definitions of trunk road and side road in physics class

There is no distinction between trunk roads and branch roads. A path.

In parallel, where all the current flows, the dry circuit is struck; Where part of the current flows is a branch.

Difference: In a simple circuit, it is directly connected to the power supply, and before there is no shunt, it is a dry circuit. (Shunt refers to the fact that there are 2 paths that can flow through the current at the same time, and the current cannot flow on the voltmeter.) In the event of a short circuit, the current flows only through the wire)

The circuit of the shunt part is the branch.

It's the same as the trunk roads and side roads of the road network. The flow of people and vehicles is understood as an electric current.

Trunk circuit: the route through which the total current of the parallel circuit flows; (like the trunk of a tree).

The electric keys on the main road can control the electrical appliances on the branch road [refers to the part of the circuit that is directly connected to the two ends of the power supply without passing through the electrical appliances].

Branch: The route through which the branch current of a parallel circuit flows. (like a tree branch).

It's easy, they're all too complicated, and if you tear down the branches, the circuits can continue to work, and that's the branches, and if you tear down the branches, the whole circuit will be paralyzed.

Erase one of the suspected branches, and if the entire circuit is undisturbed, the entire circuit is removed, and the remaining part of the circuit after wiping off the circuit is a dry circuit. (Trunk roads do not necessarily require electrical appliances).

A branch is a wire through which only one circuit passes. A trunk circuit is a wire that has two or more currents passing together. I don't know if the answer is satisfactory or not?

(1) Trunk roads and branch roads are relative. The trunk circuit is the main path through which the current travels in a circuit, and the current passing through the trunk circuit is the total current. A branch is a small circuit of two or more circuits that are bifurcated by interconnection with the trunk circuit, and generally only a part of the total current can pass through.

However, in a simple circuit in general, the sum of the currents of the branches is equal to the total currents of the trunks.

2) It can also be directly connected to the power supply is the trunk road, and the trunk circuit is divided into the branch circuit.

What is a trunk road and what is a branch road in physics.

The current comes out of the positive pole of the power supply, splits into two (or more), passes through the consumer, and then converges and returns to the negative pole of the power supply. The circuit before the shunt and after the convergence is called the trunk circuit, and the circuit after the shunt is called the branch circuit.

There are two meanings of trunk roads, one is a circuit in the physics of Dameng, and the other is a kind of urban road. Confession.

Physics & Circuits.

<> the route through which the total current of the parallel circuit flows; The electric keys on the trunk road (just like the trunk of a tree) can control the electrical appliances on the branch road [refers to the part of the circuit that is not directly connected to the power supply at both ends of the power supply through the rolling friend bridge].

(1) Trunk roads.

The main road is the main road connecting the functional areas, and is a traffic service between the various groups in the urban area, with a design speed of 40 kilometers and an area of 24-30 meters. There are 4 trunk roads planned, namely: Zhengma Avenue, Yuhuang Avenue, Future Avenue and Limin Road.

2) Trunk roads. The trunk road is the road connecting the trunk road and the branch road, mainly for the traffic service in the functional area, the design speed is 30 kilometers per hour, and the width of the road red line is 18-30 meters. 15 trunk roads are planned.

3) Slip roads. The branch road is an important part of the road system, mainly bears short-distance traffic, the branch road should avoid long-distance motor vehicle traffic crossing, the branch road bears the passage of non-motor vehicles and motor vehicles in and out of the neighborhood, the road design speed is 20 kilometers per hour, and the width of the road red line is less than 18 meters.

Article 37 Except for intersections with trunk roads or branch roads yielding traffic signs, the confirmation of branch and trunk roads at other intersections shall be determined in the following order:

1) National highways and local roads intersect, with national highways as trunk roads;

2) Multi-lane roads (with more than two motor lanes in the same direction) and non-multi-lane roads intersect, with multi-lane roads as trunk roads;

3) The road with the lane demarcation line crosses the road without the lane demarcation line, and the road with the lane demarcation line is used as the trunk road;

4) The road that passes buses and trams intersects with the roads that do not pass buses and trams, and the roads that pass buses and trams are used as trunk roads.

Can it be described like this in junior high school physics?

Trunk circuit - the only path through which the current can travel from the positive pole of the power supply or back to the negative pole of the power supply;

Branch - between two points on the trunk road, there are two or more paths through which the current can pass, and each current path between these two points is called a branch.

It's not very specific. A trunk circuit is a circuit that emits its primary function from a power supply. A branch is a circuit that plays a secondary role from a trunk road.

The trunk is the trunk of the tree, and the branch is the branch! The branches can be branched again! There is one in the parallel circuit divided into two, the original one is the trunk road, and the two separated are the branch circuits!

In parallel circuits, the total current is the dry circuit and the separate current is the branch circuit.