This questions has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes into two Statements.
Statement-I : Higher the range, greater is the resistance of ammeter.
Statement- II : To increase the range of ammeter, additional shunt needs to be used across it.
This questions has Statement I and Statement II. Of the four choices given after the Statements, choose the one that best describes into two Statements.
Statement-I : Higher the range, greater is the resistance of ammeter.
Statement- II : To increase the range of ammeter, additional shunt needs to be used across it.
Statement-I : Higher the range, greater is the resistance of ammeter.
Statement- II : To increase the range of ammeter, additional shunt needs to be used across it.
A
Statement - I is true, Statement - II is true, Statement - II is not the correct explanation of Statement - I.
B
Statement - I is true, statement - II is false.
C
Statement - I is false, Statement - II is true
D
Statement - I is true, Statement - II is true, Statement - II is the correct explanation of statement - I.
Text Solution
AI Generated Solution
The correct Answer is:
To solve the problem, we need to analyze both statements provided in the question.
### Step-by-Step Solution
1. **Understanding Statement I**:
- Statement I claims that "Higher the range, greater is the resistance of the ammeter."
- An ammeter is designed to measure current and is connected in series with the circuit.
- The resistance of an ideal ammeter should be zero to minimize the voltage drop across it, allowing maximum current to flow through the circuit.
- Therefore, if we want to increase the range of the ammeter (the maximum current it can measure), we actually need to decrease its resistance.
- **Conclusion**: Statement I is **False**.
2. **Understanding Statement II**:
- Statement II states that "To increase the range of the ammeter, additional shunt needs to be used across it."
- A shunt resistor is connected in parallel with the ammeter to allow a portion of the current to bypass the ammeter.
- By adding a shunt, we effectively reduce the total resistance of the circuit, which allows the ammeter to measure higher currents without being damaged.
- This means that adding a shunt increases the range of the ammeter.
- **Conclusion**: Statement II is **True**.
3. **Final Evaluation**:
- Since Statement I is false and Statement II is true, we can conclude that the correct option is the one that states that the first statement is false and the second statement is true.
### Final Answer:
The correct choice is: **Statement I is false, Statement II is true.**
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