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Read the passage and answer the questions:
Three resistors of 5 Ω, 10 Ω and 15 Ω are connected in series and the combination is connected to the battery of 30 V. Ammeter and voltmeter are connected in the circuit.
Q. The device used to measure the current:
  • a)
    Ammeter
  • b)
    Galvanometer
  • c)
    Voltmeter
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Read the passage and answer the questions:Three resistors of 5 Ω, 10 ...
An ammeter (abbreviation of Ampere meter) is a measuring instrument used to measure the current in a circuit. Electric currents are measured in Amperes (A), hence the name. The ammeter is usually connected in series with the circuit in which the current is to be measured.
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Read the passage and answer the questions:Three resistors of 5 Ω, 10 ...
Answer:
The device used to measure the current is an ammeter.

Explanation:
In the given circuit, the resistors are connected in series and the combination is connected to the battery. The current flowing through the circuit can be measured using an ammeter.

What is an ammeter?
- An ammeter is a device used to measure the electric current in a circuit.
- It is connected in series with the circuit, meaning that the current flows through the ammeter.
- The ammeter is designed to have a very low resistance so that it does not affect the current flow in the circuit.

How does an ammeter work in the given circuit?
- In the given circuit, the resistors are connected in series, which means that the same current flows through each resistor.
- When the circuit is closed and the battery is connected, the current flows from the positive terminal of the battery, through the resistors, and back to the negative terminal of the battery.
- The ammeter is connected in series with the resistors, so the same current flows through the ammeter.
- By measuring the current with the ammeter, we can determine the total current flowing through the circuit.

Why are the other options incorrect?
- Galvanometer: A galvanometer is a device used to detect the presence of current in a circuit, but it cannot measure the exact value of the current. However, an ammeter is a type of galvanometer that is designed to measure current accurately.
- Voltmeter: A voltmeter is a device used to measure the voltage difference between two points in a circuit. It is connected in parallel to the circuit, not in series like the ammeter.
- None of these: This option is incorrect because an ammeter is the correct device to measure current in the given circuit.

Conclusion:
Therefore, the device used to measure the current in the given circuit is an ammeter.
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Read the passage and answer the questions:Three resistors of 5 Ω, 10 Ω and 15 Ω are connected in series and the combination is connected to the battery of 30 V. Ammeter and voltmeter are connected in the circuit.Q. The device used to measure the current:a)Ammeterb)Galvanometerc)Voltmeterd)None of theseCorrect answer is option 'A'. Can you explain this answer?
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