Class 12 Exam  >  Class 12 Videos  >  Problem: Wheatstone Bridge Numericals (Part - 22) - Capacitor & Capacitance, Physics, Class 12

Problem: Wheatstone Bridge Numericals (Part - 22) - Capacitor & Capacitance, Physics, Class 12 Video Lecture

FAQs on Problem: Wheatstone Bridge Numericals (Part - 22) - Capacitor & Capacitance, Physics, Class 12 Video Lecture

1. What is a Wheatstone Bridge?
Ans. A Wheatstone Bridge is a circuit used to measure unknown resistance by using a known resistance and a variable resistance. It is based on the principle of null deflection, where the bridge is balanced when the ratio of the resistances in the arms of the bridge is equal.
2. How does a Wheatstone Bridge work?
Ans. A Wheatstone Bridge works by comparing the ratio of the resistances in two arms of the bridge circuit. When the bridge is balanced, the potential difference across the galvanometer becomes zero, indicating that the ratio of the resistances is equal. This balance condition is used to determine the value of an unknown resistance.
3. What is the role of a capacitor in a Wheatstone Bridge?
Ans. In a Wheatstone Bridge, a capacitor is used to introduce capacitance into the circuit. It helps in balancing the bridge by compensating for the resistance of the arms. The capacitance value can be adjusted to achieve a balanced condition in the bridge.
4. How is capacitance calculated in a Wheatstone Bridge?
Ans. The capacitance in a Wheatstone Bridge can be calculated using the formula: C = (R2/R1) * C1 Where C is the unknown capacitance, R1 and R2 are the known resistances in the bridge arms, and C1 is the value of the known capacitance.
5. What are the applications of a Wheatstone Bridge in capacitance measurements?
Ans. Wheatstone Bridge is widely used in capacitance measurements. Some of its applications include: - Capacitor testing: It can be used to determine the capacitance value of an unknown capacitor. - Quality control: It is used in industries to ensure the quality and accuracy of manufactured capacitors. - Calibration: Wheatstone Bridge is used to calibrate capacitance meters and instruments. - Research and development: It is used in scientific research to study the characteristics of capacitors. - Circuit design: Wheatstone Bridge is used to optimize and design circuits involving capacitors.
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