Question 1 of 15
What is the primary function of a Wheatstone bridge?
The Wheatstone bridge is specifically designed to accurately determine the value of an unknown resistance.
Question 2 of 15
Who is credited with developing the Wheatstone bridge to its modern form?
Sir Charles Wheatstone improved the design and popularized its use.
Question 3 of 15
In a Wheatstone bridge, what condition signifies a balanced state?
A balanced bridge indicates no current flows through the galvanometer, implying zero potential difference.
Question 4 of 15
Which of the following components is essential for a Wheatstone bridge?
Resistors are the fundamental building blocks of a Wheatstone bridge.
Question 5 of 15
What is the shape formed by the resistors in a typical Wheatstone bridge circuit diagram?
The resistors are arranged in a diamond shape.
Question 6 of 15
What instrument is commonly used to detect the balance point in a Wheatstone bridge?
A galvanometer detects the absence of current flow, indicating a balanced bridge.
Question 7 of 15
If R1 = 100 ohms, R2 = 200 ohms, and R3 = 50 ohms, what is the value of Rx (unknown resistance) for a balanced bridge?
Rx = (R2/R1) * R3 = (200/100) * 50 = 100 ohms
Question 8 of 15
What is the formula to calculate the unknown resistance (Rx) in a balanced Wheatstone bridge?
The formula correctly relates the known resistances to the unknown resistance in a balanced bridge.
Question 9 of 15
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, so the voltage difference is zero.
Question 10 of 15
What happens if the Wheatstone bridge is unbalanced?
An unbalanced bridge results in a potential difference, causing current to flow through the galvanometer.
Question 11 of 15
Which of the following is NOT an application of the Wheatstone bridge?
Wheatstone bridges are primarily used for resistance measurement. AC voltage measurement is not one of its direct applications.
Question 12 of 15
If the bridge is unbalanced, the output voltage (Vout) is equal to what?
The output voltage is the difference between the voltages at points C and D (Vc - Vd).
Question 13 of 15
What is the main advantage of using a Wheatstone bridge for resistance measurement?
Wheatstone bridges are known for their precision, especially when measuring low resistance values.
Question 14 of 15
Which component in the Wheatstone bridge circuit is typically variable?
R4 or R3, is commonly a variable resistor, adjusted to balance the bridge.
Question 15 of 15
What is the purpose of the rheostat in the Wheatstone bridge circuit?
The rheostat allows for the adjustment of resistance, enabling the bridge to be balanced.
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