Battery is a source of

Options

A. current
B. emf
C. momentum
D. charge

Answer

To answer the question "Battery is a source of", we can follow these steps:

### Step 1: Understand the Components of a Battery
A battery consists of two terminals (positive and negative) and has an internal resistance. It generates electrical energy through chemical reactions.

**Hint:** A battery has two main components: terminals and internal resistance.

### Step 2: Identify the Function of a Battery
The primary function of a battery is to provide electrical energy when connected to a circuit. This energy is often measured in terms of voltage.

**Hint:** Think about what happens when a battery is connected to a circuit.

### Step 3: Define EMF (Electromotive Force)
EMF stands for Electromotive Force, which is the voltage generated by the battery. It is the energy provided per unit charge by the battery.

**Hint:** EMF is related to the voltage that a battery provides when connected to a circuit.

### Step 4: Analyze the Options Given
The options provided are:
1. Current
2. EMF
3. Momentum
4. Charge

From our understanding, the battery primarily provides EMF when connected to a circuit.

**Hint:** Look for the option that relates to the energy or voltage provided by the battery.

### Step 5: Conclusion
Based on the analysis, the correct answer is that a battery is a source of EMF.

**Final Answer:** Battery is a source of EMF.

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