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How to use a wire and a battery to light a small bulb? It's a primary school version
Connect the two sides of the battery with wires, and connect the other two sides with small bulbs to form a whole
There are three small light bulbs, dry batteries, switches and wires, etc. there are several ways to make it glow? Draw your circuit diagram
Originally very simple, but there are two cases: 1. Three bulbs are exactly the same
2. The three bulbs are totally different
I don't know what the title says is different. If it's different, what's the difference in connection
Four kinds of series, parallel, series parallel, parallel series
A battery, a light bulb, wires, how to make the bulb light up
One end of the wire is connected to the negative pole of the battery, and the other end is connected to the bulb. Just put the contact of the bulb on the positive pole
Advanced circuit: when the bridge is balanced, connect a wire in the middle. Why is there no current? If the potentials at both ends are equal and there is no current, then in a bridge connected by the power supply and the resistance, the current is equal
In a closed circuit, if one of the wires is taken, the potential at both ends is equal, but why is there current?
As long as the potential at both ends of the wire is really equal, then the current flowing through it is indeed 0. But in the actual circuit, compared with other components of the circuit, the resistance of the wire can be almost ignored, so the voltage drop at both ends of a section of wire can also be ignored
RELATED INFORMATIONS
- 1. When two conductors with the same length and different cross-sectional area are connected in series, they compare the current and voltage. The thin one is ab, and the thick one is BC
- 2. Is there any relationship between the current and the cross-section of the wire? If the material is the same and the length is the same, only the cross-sectional area is different I = nesv
- 3. In the series circuit, if one bulb is removed (there are multiple bulbs), will the total current change and the total voltage change?
- 4. A copper wire and a nickel chromium alloy wire are of the same length and thickness. If they are connected in series in the circuit, which wire has the higher voltage at both ends? Which wire has the most current? Why?
- 5. As shown in the figure, the circuit only needs to change the connection of one wire, so that the ammeter can measure the current passing through two bulbs at the same time, mark "×" on the wire to be connected, and then draw the wire to be connected
- 6. Give you a battery pack, two switches S1 and S2, two lights L1 and L2, and several wires. Design a circuit. Requirements: when S1 is closed only, L1 and L2 will light up; when S2 is closed only, L1 and L2 will not light up; when S1 and S2 are closed, L2 will not light up, L1 will light up, and it is bright
- 7. There is a section of conductor. When the voltage at both ends is 2 V, the current passing through it is 0.5 A, and the resistance of this section of conductor is () A. if the applied voltage is zero, the current passing through it is () a, and the resistance of this section of conductor is () Ω
- 8. Short circuit / open circuit, is there current or voltage? When the circuit is short circuited, When the circuit is short circuited, When the circuit is open, When the circuit is open, Please give a specific answer So why is there current and no voltage when there is a short circuit? Is voltage not the cause of travel current? How can there be current without voltage?
- 9. Electricity. It's very easy, that is, when there is a short circuit, does the voltmeter show the number and ammeter? Is it open circuit?
- 10. Physics and electricity in Junior Three
- 11. As shown in the figure, two parallel long straight wires a and B carry currents of the same size and opposite direction, and the magnetic force on a is F1. When a uniform magnetic field perpendicular to the plane of the wire is added, the magnetic force on a becomes F2, and the magnetic force on B becomes () A. F2B. F1-F2C. F1+F2D. 2F1-F2
- 12. Explain: why is the potential equal at both ends of a wire connection in a circuit?
- 13. As shown in the figure, two parallel long and straight wires are respectively connected with current I1 and I2 in opposite directions, and I1
- 14. When a voltage of 6V is applied at both ends of a conductor, the current passing through it is 0.4A, and the resistance of the conductor is__ If the voltage at both ends of the conductor becomes 9V, the resistance of the conductor is__ The current through the conductor is__ .
- 15. There is a resistance line. If the current in the resistance line is 0.5A when 6V voltage is applied at both ends, the resistance of the resistance line is______ Ω, if the voltage of 12V is applied at both ends, the current passing through the resistance line is______ A. The resistance of the resistance wire is______ Ω; if there is no voltage at both ends of the resistance line, the current through the resistance line is______ A. The resistance of the resistance wire is______ Ω．
- 16. The voltage at both ends of the wire is 10V, and the resistance of the wire is ignored. Calculate the current in the wire
- 17. When the voltage at both ends of a conductor is 8V, the current passing through it is 0.2A. When the voltage at both ends of a conductor decreases by 2V, how much is the current passing through it and how much is its resistance?
- 18. The basic problem of the voltage of the parallel circuit in junior high school physics, physics teacher, please come in, there is an additional is not to say 'the voltage at both ends of each parallel branch in the parallel circuit is equal' Junior three physics parallel circuit voltage basic problem, physics teacher please come in, there are additional It doesn't mean that the voltage at both ends of each parallel branch in a parallel circuit is equal, but why is it equal to the total voltage at both ends of the main circuit? It doesn't mean that the two outgoing branches are equal, but it has to be smaller than the main circuit, just like 2 can't be equal to 2 + 2
- 19. In physics calculation, the voltage of power supply in series circuit remains unchanged, which means that the voltage is equal everywhere? Is the voltage equal everywhere equal to the supply voltage
- 20. The voltage at both ends of the conductor is 12 volts. The current passes through the conductor in 5 seconds and does 24 joules of work. During this period, the current passes through the cross section of the conductor