Question

Лабораторная работа № 4. Исследование зависимости силы тока от напряжения на участке цепи . Как включить в электрическую цепь амперметр и вольтметр, чтобы определить сопротивление электрического обогревателя? 1)Надо включить электрический обогреватель последовательно с вольтметром и амперметром.2)Амперметр и вольтметр надо включить параллельно электрическому обогревателю. 3)Вольтметр надо включить параллельно электрическому обогревателю, а амперметр – последовательно. 4)При помощи вольтметра и амперметра невозможно измерить сопротивление электрического обогревателя.​

Answer 1

Ответ:

Вольтметр надо включить параллельно электрическому обогревателю, а амперметр – последовательно.

Объяснение:

Answer 2

How to connect an ammeter and voltmeter to determine the resistance of an electric heater?

To determine the resistance of an electric heater, you need to connect an ammeter and a voltmeter to the circuit. Here's how you should connect them:

Option 3) Voltmeter in parallel, ammeter in series

In this option, you should connect the voltmeter in parallel to the electric heater, and the ammeter in series with the electric heater. This configuration allows you to measure both the voltage across the heater and the current flowing through it, which are necessary to calculate the resistance.

Here's a step-by-step guide:

1. Turn off the power supply to the circuit to ensure safety. 2. Connect the positive terminal of the voltmeter to one end of the electric heater. 3. Connect the negative terminal of the voltmeter to the other end of the electric heater. 4. Connect the ammeter in series with the electric heater by connecting the positive terminal of the ammeter to one end of the electric heater and the negative terminal of the ammeter to the other end of the electric heater. 5. Make sure all connections are secure. 6. Turn on the power supply to the circuit. 7. Take readings from both the voltmeter and the ammeter. 8. Use Ohm's law (V = I * R) to calculate the resistance of the electric heater, where V is the voltage measured by the voltmeter and I is the current measured by the ammeter.

Remember to follow proper safety precautions when working with electricity, such as wearing insulated gloves and using appropriate tools.

Please note that option 4) is incorrect. It states that it is impossible to measure the resistance of an electric heater using a voltmeter and an ammeter, which is not true.

I hope this helps! Let me know if you have any further questions.