If the resistance values in a Wheatstone bridge are all equal, what is the condition for balance?
Practice Questions
1 question
Q1
If the resistance values in a Wheatstone bridge are all equal, what is the condition for balance?
All resistances must be zero
Any resistance can be changed
The bridge is always balanced
The bridge is never balanced
If all resistances are equal, the bridge is always balanced regardless of the values.
Questions & Step-by-step Solutions
1 item
Q
Q: If the resistance values in a Wheatstone bridge are all equal, what is the condition for balance?
Solution: If all resistances are equal, the bridge is always balanced regardless of the values.
Steps: 6
Step 1: Understand what a Wheatstone bridge is. It is a circuit used to measure unknown resistances.
Step 2: Identify the four resistors in the Wheatstone bridge. Let's call them R1, R2, R3, and R4.
Step 3: Note that the question states all resistance values are equal. So, R1 = R2 = R3 = R4.
Step 4: Recall the condition for balance in a Wheatstone bridge. The bridge is balanced when the ratio of the resistances in one branch equals the ratio in the other branch.
Step 5: Since all resistances are equal, the ratios R1/R2 and R3/R4 will both equal 1 (because any number divided by itself is 1).
Step 6: Conclude that if all resistances are equal, the bridge is always balanced, regardless of the actual resistance values.
