Given below are two statements labelled as Assertion (A) and Reason (R)
Assertion (A): To increase the range of an ammeter, we must connect a suitable high resistance in series to it.
Reason (R): The ammeter with increased range should have high resistance
Select the most appropriate answer from the options given below :

Options

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false
D. A is false and R is also false.

Answer

To solve the question regarding the Assertion (A) and Reason (R) about the ammeter, let's break it down step by step.

### Step 1: Understand the Assertion (A)
The assertion states: "To increase the range of an ammeter, we must connect a suitable high resistance in series to it."

- **Analysis**: This statement is incorrect. To increase the range of an ammeter, we actually need to connect a low resistance in parallel with the ammeter, not a high resistance in series. A high resistance in series would limit the current that can pass through the ammeter, thus reducing its effective range.

### Step 2: Understand the Reason (R)
The reason states: "The ammeter with increased range should have high resistance."

- **Analysis**: This statement is also incorrect. An ammeter is designed to have very low resistance to allow maximum current to flow through it. If we were to increase the range of the ammeter, we would use a shunt resistor (which is a low resistance) in parallel, not a high resistance.

### Step 3: Evaluate the Statements
Now, we evaluate both statements:
- Assertion (A) is false.
- Reason (R) is also false.

### Conclusion
Based on the evaluations:
- The correct answer is: "A is false and R is also false."

### Final Answer
The most appropriate answer is: **Option 4: A is false and R is also false.**

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