Question 1 of 10
What is the primary function of a Wheatstone bridge?
The primary function is to measure unknown resistance accurately.
Question 2 of 10
Who is credited with developing the Wheatstone bridge to its modern form?
Sir Charles Wheatstone improved the design and made it well-known.
Question 3 of 10
In a balanced Wheatstone bridge, what is the voltage difference between points C and D?
In a balanced bridge, the potential at points C and D are equal, thus, the voltage difference is zero.
Question 4 of 10
Which of the following components is essential for the operation of a Wheatstone bridge?
Resistors are the fundamental components of the bridge circuit.
Question 5 of 10
What is the formula for calculating an unknown resistance (Rx) in a balanced Wheatstone bridge?
The formula is derived from the balance condition: R1/R2 = R3/Rx.
Question 6 of 10
What happens when a Wheatstone bridge is unbalanced?
When unbalanced, a potential difference exists, and current flows through the galvanometer.
Question 7 of 10
What is the purpose of the variable resistor (rheostat) in a Wheatstone bridge?
The rheostat is adjusted until the bridge balances, allowing for the unknown resistance to be calculated.
Question 8 of 10
Which device is typically used to detect the balance condition in a Wheatstone bridge?
The galvanometer detects the absence of current flow, indicating a balanced bridge.
Question 9 of 10
Besides measuring resistance, what are some applications of the Wheatstone bridge?
Wheatstone bridges can be adapted for a variety of sensing and measurement applications.
Question 10 of 10
In the example provided, if R1=50 ohms, R2=100 ohms, R3=40 ohms, what should be the value of R4 for the bridge to be balanced?
Using the formula Rx = (R2 / R1) * R3 = (100/50)*40 = 80 ohms.
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