If the battery and galvanometer are interchanged then the deflection in galvanometer will

Options

A. See no change
B. Change in previous direction
C. Change in opposite direction
D. Circuit will die

Explanation

To solve the problem, we need to analyze the situation when the battery and galvanometer are interchanged in a circuit. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Initial Setup
Initially, we have a circuit with a battery connected to a galvanometer. The galvanometer measures the current flowing through the circuit, which is influenced by the voltage provided by the battery and the resistance in the circuit.

**Hint:** Identify the components in the circuit and their roles. The battery provides voltage, and the galvanometer measures current.

### Step 2: Analyze the Circuit with Battery and Galvanometer
In the initial configuration, the galvanometer shows a certain deflection based on the current flowing through it, which is determined by Ohm's law (V = IR). The deflection is proportional to the current that flows through the galvanometer.

**Hint:** Recall Ohm's law and how it relates voltage, current, and resistance.

### Step 3: Interchange the Battery and Galvanometer
When we interchange the battery and the galvanometer, the galvanometer is now connected in such a way that it measures the potential difference across the terminals of the battery. The battery, now in the position of the galvanometer, will provide a voltage that drives current through the circuit.

**Hint:** Think about how the roles of the components change when they are swapped.

### Step 4: Determine the New Reading on the Galvanometer
After the interchange, the galvanometer will still measure the potential difference across the same resistance. The voltage drop across the resistance will still be calculated using the same principles. The reading on the galvanometer will reflect the potential difference, which remains unchanged since the circuit characteristics (resistance and battery voltage) are the same.

**Hint:** Consider that the potential difference across the resistance remains constant despite the interchange.

### Step 5: Conclusion
Since the potential difference across the resistance does not change when the battery and galvanometer are interchanged, the deflection in the galvanometer will also remain unchanged.

**Final Answer:** The deflection in the galvanometer will be the same (no change).