Question

Stray capacitance effects can be minimized by _____ .

• A. Making use of an inductance
• B. Connecting a resistance in series
• C. Shielding and grounding
• D. Using a galvanometer

Hint:

Minimizing Stray Capacitance Effects. Use proper layout (spacing), guarding techniques, and especially electrostatic shielding (often grounded) to reduce unwanted capacitive coupling. Grounding provides a stable reference potential.

Answer 1

The Correct Option is C

Stray capacitance is unwanted capacitance that exists between conductive parts of a circuit or between circuit components and their surroundings (like ground or other components) due to their proximity
It can cause signal coupling, loading effects, and alter frequency response, especially at high frequencies
- Shielding: Enclosing sensitive components or wires within a grounded conductive shield intercepts stray electric fields, preventing them from coupling capacitively to the component
- Grounding (Earthing): Properly grounding circuit components and shields provides a common reference potential and directs stray currents or fields to ground, minimizing their impact on the circuit's operation
Wagner earth devices in AC bridges are a specific example
Inductors and resistors don't directly minimize stray capacitance itself, though they might be used in filter circuits
Galvanometers are detectors
Shielding and grounding are the primary techniques to minimize the *effects* of stray capacitance