In which of the following circuits will the bulb glow

Options

A.
B.
C.
D. none of these

Answer

To determine in which of the given circuits the bulb will glow, we need to analyze each circuit based on whether the circuit is complete or incomplete. A complete circuit allows electric current to flow, which is necessary for the bulb to glow.

### Step-by-Step Solution:

1. **Understanding the Circuit Components**:
- A circuit typically consists of a power source (like a battery), wires, and a load (like a bulb). For the bulb to glow, the circuit must be complete, allowing electric current to flow from the power source through the bulb and back to the power source.

2. **Analyzing Option 1**:
- In Option 1, one terminal of the bulb is connected to the positive terminal of the battery, and the other terminal is connected to the negative terminal of the battery.
- Since both terminals of the bulb are connected to the battery, this creates a complete circuit.
- **Conclusion for Option 1**: The bulb will glow because the circuit is complete.

3. **Analyzing Option 2**:
- In Option 2, one terminal of the bulb is connected to the negative terminal of the battery, but the other terminal is left disconnected (there is a gap).
- This means that the circuit is incomplete; there is no continuous path for the electric current to flow.
- **Conclusion for Option 2**: The bulb will not glow because the circuit is incomplete.

4. **Final Conclusion**:
- The only option where the bulb will glow is Option 1, where the circuit is complete.

### Final Answer:
The bulb will glow in **Option 1**.