Inter-base resistance of UJT is of the order of ______

Explanation:

Inter-base Resistance of UJT

Definition: The inter-base resistance of a Unijunction Transistor (UJT) is the resistance measured between the two base terminals of the UJT. This resistance is a key parameter in the operation of the UJT and affects its performance in various applications.

Working Principle: A Unijunction Transistor (UJT) is a three-terminal semiconductor device used primarily in triggering applications. The UJT has a unique structure with an emitter and two bases (B1 and B2). The inter-base resistance is the resistance between the two bases, B1 and B2, when no voltage is applied to the emitter.

Correct Option Analysis:

The correct option is:

Option 1: 5 to 10 kΩ

This range correctly represents the typical inter-base resistance of a UJT. The inter-base resistance is usually in the range of a few kilo-ohms, specifically between 5 kΩ and 10 kΩ. This resistance is a crucial factor in determining the UJT's intrinsic standoff ratio and its overall behavior in circuits.

Additional Information

To further understand the analysis, let’s evaluate the other options:

Option 2: 50 to 100 kΩ

This range is too high for the inter-base resistance of a UJT. UJTs are designed to have lower inter-base resistances to ensure proper functioning in their intended applications, such as triggering and timing circuits.

Option 3: 500 to 1000 Ω

This range is lower than the typical inter-base resistance of a UJT. While some semiconductor devices may have resistances in this range, UJTs generally have inter-base resistances in the kilo-ohm range to maintain their operational characteristics.

Option 4: 50 to 100 Ω

This range is significantly lower than the typical inter-base resistance of a UJT. Such low resistance values are not characteristic of UJTs and would not support their normal operation. UJTs require higher resistance values to ensure proper triggering and switching behavior.

Conclusion:

Understanding the inter-base resistance of a Unijunction Transistor is essential for correctly identifying its operational characteristics and ensuring its proper application in electronic circuits. The correct inter-base resistance range for a UJT is between 5 kΩ and 10 kΩ, which supports its unique functionality and performance in various triggering and timing applications.