Which of the field patterns given below is valid for electric field as well as for magnetic field?

Options

A.
B.
C.
D.

Explanation

To solve the question of which field pattern is valid for both electric and magnetic fields, we will analyze the given options step by step.

### Step 1: Understand the Characteristics of Electric and Magnetic Fields
- **Electric Field**: Electric field lines originate from positive charges and terminate at negative charges. They do not form closed loops.
- **Magnetic Field**: Magnetic field lines always form closed loops. They emerge from the north pole of a magnet and enter the south pole, and they can also be generated around a current-carrying conductor.

### Step 2: Analyze Each Option
- **Option A**: Represents electric field lines from a positive charge. These lines do not form closed loops and only represent an electric field. **(Incorrect)**

- **Option B**: Represents electric field lines from a negative charge. Similar to option A, these lines do not form closed loops and only represent an electric field. **(Incorrect)**

- **Option C**: Shows circular field lines. This pattern can represent the magnetic field around a current-carrying wire, which forms closed loops. Additionally, if the magnetic field is changing, it can induce an electric field with similar circular lines. This pattern is valid for both electric and magnetic fields. **(Correct)**

- **Option D**: Displays the field lines of a bar magnet. This pattern only represents a magnetic field and does not apply to electric fields. **(Incorrect)**

### Step 3: Conclusion
After analyzing all the options, we conclude that **Option C** is the only pattern that is valid for both electric and magnetic fields.

### Final Answer
**Option C** is the correct answer.

---