Pyroelectric crystals feeble electric current

Options

A. On deformation
B. On dissolving in a solvent
C. On heating
D. On sublimation

Answer

**Step-by-Step Solution:**

1. **Understanding Pyroelectric Crystals:**
- Pyroelectric crystals are materials that exhibit a property known as pyroelectricity. This means that they can generate an electric charge in response to a change in temperature.

2. **Defining the Pyroelectric Effect:**
- The pyroelectric effect occurs when certain polar crystals produce an electric current when they are heated. This is due to the movement of charge carriers within the crystal structure as the temperature changes.

3. **Heating the Crystal:**
- When a pyroelectric crystal is heated, the thermal energy causes the dipoles within the crystal to become more active. This results in a separation of charges, leading to the generation of an electric current.

4. **Conclusion:**
- Therefore, the correct answer to the question regarding pyroelectric crystals and feeble electric current is that the electric current is generated "ON heating" the crystal.

**Final Answer:**
- The feeble electric current in pyroelectric crystals is produced ON heating.

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