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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
Remove the wire connecting the ammeter and bulb L2, and connect the lamp L1 with the right terminal of lamp L2, as shown in the figure
The circuit of Xiaoming's experiment of "measuring current with ammeter" is shown in the figure. Please connect the circuit completely with pen wire instead of wire, so that L1 and L2 are connected in parallel. The ammeter measures the current through L1. In order to study the current relationship in the parallel circuit, he should continue to measure the current through L1______ And______ And then conclude
(1) Connect the circuit according to the two paths in the analysis, as shown in the figure below: (2) since we are studying the current relationship in the parallel circuit, we need to measure the current values of L1, L2 and trunk road, and analyze the data to draw the experimental conclusion
There is an ammeter, a power supply, two lamps, connected with the physical picture
Connect the ammeter in series with L2, connect it as a whole in parallel with L1, and then connect it to the power supply
At present, there is a battery pack, two small bulbs L1 and L2, two switches S1 and S2, and several wires. Please design a circuit and draw a circuit diagram. Requirements: (1) when S1 and S2 are closed, both lamps will light up; (2) when S1 is closed, L1 will light up, L2 will not light up; (3) when S2 is closed, L2 will light up, L1 will not light up
According to the analysis, two bulbs are connected in parallel, S1 controls bulb L1, S2 controls bulb L2, and the corresponding circuit diagram is drawn as shown in the figure
RELATED INFORMATIONS
- 1. 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
- 2. 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
- 3. 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?
- 4. 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?
- 5. Physics and electricity in Junior Three
- 6. Connect wires on both sides of the resistance, and the resistance is short circuited. It can be seen that the resistance is in parallel with that wire. Because the resistance of the wire is small, the current is low So is the current basically distributed to the wire? In fact, will there be a little current through the short-circuit resistor?
- 7. In refitting the ammeter, wouldn't it be short circuited by connecting a resistor to the ammeter
- 8. How to judge which electric appliance or circuit is measured by Voltmeter and ammeter
- 9. An ammeter is equivalent to a wire. What is a voltmeter equivalent to?
- 10. In the circuit, what are the burnt out appliances, ammeters and voltmeters equivalent to? Are they wires or switches?
- 11. 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?
- 12. In the series circuit, if one bulb is removed (there are multiple bulbs), will the total current change and the total voltage change?
- 13. 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
- 14. 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
- 15. How to use a wire and a battery to light a small bulb? It's a primary school version
- 16. 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
- 17. Explain: why is the potential equal at both ends of a wire connection in a circuit?
- 18. As shown in the figure, two parallel long and straight wires are respectively connected with current I1 and I2 in opposite directions, and I1
- 19. 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__ .
- 20. 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．