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Test: DC Bridges (Wheatstone bridge)


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25 Questions MCQ Test Sensor & Industrial Instrumentation | Test: DC Bridges (Wheatstone bridge)

Test: DC Bridges (Wheatstone bridge) for GATE 2022 is part of Sensor & Industrial Instrumentation preparation. The Test: DC Bridges (Wheatstone bridge) questions and answers have been prepared according to the GATE exam syllabus.The Test: DC Bridges (Wheatstone bridge) MCQs are made for GATE 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: DC Bridges (Wheatstone bridge) below.
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Test: DC Bridges (Wheatstone bridge) - Question 1

D.C. bridges are used for _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 1 Resistance measurements are done using a suitable D.C. bridge.
Test: DC Bridges (Wheatstone bridge) - Question 2

Commonly used D.C. bridges are _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 2 Wheatstone and Kelvin are the commonly used bridges for measuring resistance. Wagner’s and De Sauty’s bridges are used for shielding the circuit.
Test: DC Bridges (Wheatstone bridge) - Question 3

Wheatstone bridge is a __________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 3 The Wheatstone bridge is a d.c. Bridge that is used for the measurement of medium resistance. Schering bridge is used for the measurement of high voltages. AC bridges comprise Anderson bridge, Maxwell Bridge, etc.
Test: DC Bridges (Wheatstone bridge) - Question 4

Wheatstone bridge consists of _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 4 A Wheatstone bridge essentially consists of 4 resistive arms. The arms are such that two resistances appear across each end.
Test: DC Bridges (Wheatstone bridge) - Question 5

How many resistances are used in a Wheatstone bridge?

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 5 Wheatstone bridge is an arrangement of four resistors, P, Q, R, and S, such that if we know the value of the resistances of any three of them, we can obtain the value of fourth unknown resistance. Therefore, there are four resistances in a Wheatstone bridge.
Test: DC Bridges (Wheatstone bridge) - Question 6

Thermal compensation can be provided in a Wheatstone bridge by ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 6 Using more than one resistive sensor within the four arms of a Wheatstone bridge, we get a full-bridge, half-bridge, or quarter bridge set up with an automatic balancing effect.
Test: DC Bridges (Wheatstone bridge) - Question 7

Wheatstone bridge is used to measure resistance in the range of ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 7 Wheatstone bridge is the simplest form of the bridge circuit. It is used to measure medium resistances in the range of 1Ω to a few megaohms.
Test: DC Bridges (Wheatstone bridge) - Question 8

One of the most straightforward applications of a Wheatstone bridge is ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 8 Wheatstone bridge consists of simple resistances in the ratio arms. One of the most straightforward applications of a Wheatstone bridge is measuring light using a resistive photo device.
Test: DC Bridges (Wheatstone bridge) - Question 9

How can a Wheatstone bridge be used to measure physical parameters?

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 9 A Wheatstone bridge can be used to measure physical parameters such as temperature, strain, light, etc., by using an operational amplifier. Rectifier circuits are used for the conversion of ac to dc.
Test: DC Bridges (Wheatstone bridge) - Question 10

Wheatstone bridge is used to measure the d.c. resistance of various types of wires for _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 10 Wheatstone bridge is used to measure the d.c. resistance of various types of wires for controlling the quality of the cables. The voltage source maintains a constant e.m.f in the bridge circuit.
Test: DC Bridges (Wheatstone bridge) - Question 11

Telephone companies make use of the Wheatstone bridge for _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 11 Cable faults in telephones can be located by telephone companies using a Wheatstone bridge. Telephonic resistances are determined using suitable techniques. Dialtone is maintained through optical fiber technology.
Test: DC Bridges (Wheatstone bridge) - Question 12

By using the variations on a Wheatstone bridge we can _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 12 In its simplest form, a Whetstone bridge consists of resistive arms. A Wheatstone bridge is used to measure quantities such as capacitance, inductance, and impedance by using the variations.
Test: DC Bridges (Wheatstone bridge) - Question 13

The types of faults in a telephone line are ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 13 In a telephone line, line to line and line to ground faults occur. Symmetrical, unsymmetrical, open circuit, short circuit, triple line to line, and line to ground faults occur in power systems.
Test: DC Bridges (Wheatstone bridge) - Question 14

Which instrument is used as the null detector in the Wheatstone bridge?

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 14 A galvanometer is used as the null detector in a Wheatstone bridge. The null point means the situation in which no current flows through the circuit. A galvanometer is used to measure the current and determine the voltage between any two ends of the circuit. A galvanometer is used due to its sensitivity, and therefore, even small currents can be measured.
Test: DC Bridges (Wheatstone bridge) - Question 15

The equation of balanced Wheatstone bridge is PR = QS.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 15 No. A Wheatstone bridge is an electrical device used to measure unknown resistance by placing it in one of the branches and balancing the two legs of the bridge. If R is the unknown resistance, S is varied until the galvanometer shows null deflection, whereas P and Q are fixed. This is a balanced condition. So the equation is (frac {P}{Q} = frac {R}{S}) → PS = QR. Also, in the balanced condition, no current passes through the galvanometer.
Test: DC Bridges (Wheatstone bridge) - Question 16

Identify the definition of sensitivity of a galvanometer from the following.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 16 Sensitivity of a galvanometer is defined as the ratio of deflection in the galvanometer to the unit change in unknown resistance. The sensitivity of a galvanometer can be increased by increasing the number of turns, increasing the coil area, or using a strong magnet.
Test: DC Bridges (Wheatstone bridge) - Question 17

Find the false statement.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 17 The false statement is Wheatstone bridge is susceptible to high DC. It is not vulnerable to high DC and can give inaccurate readings if not balanced. The Wheatstone bridge measures resistance from few ohms mega ohms. All the other statements are valid.
Test: DC Bridges (Wheatstone bridge) - Question 18

Balance condition can be obtained by _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 18 The balance condition in a Wheatstone bridge can be obtained by varying the resistances R1 and R2. The null detector is used for determining the balance condition.
Test: DC Bridges (Wheatstone bridge) - Question 19

What is connected between the two ends of a Wheatstone bridge?

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 19 A battery is connected between the two ends of the Wheatstone bridge, while a galvanometer is connected between the opposite two ends of the circuit. The ammeter is connected in series with the circuit.
Test: DC Bridges (Wheatstone bridge) - Question 20

The opposite two ends of a Wheatstone bridge consist of _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 20 The two opposite ends of a Wheatstone bridge circuit consisting of a source of e.m.f and a null detector. Four arms of a Wheatstone bridge consist of resistances. Inductance and capacitance do not appear in a Wheatstone bridge.
Test: DC Bridges (Wheatstone bridge) - Question 21

The arms consisting of the resistances R1 and R2 are called _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 21 The arms consisting of the two resistances R1 and R2, are known as the resistance arms. Sources do not appear on the arms of the bridge, and they are connected across opposite ends. Wheatstone bridge is purely resistive.
Test: DC Bridges (Wheatstone bridge) - Question 22

The arm consisting of the standard known resistance R3 is known as __________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 22 The arm consisting of the standard known resistance R3 is known as the legal arm. Using this resistance value, the unknown resistance can be determined using the balance condition.
Test: DC Bridges (Wheatstone bridge) - Question 23

Wheatstone bridge works on the principle of ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 23 The Wheatstone bridge works on the principle of null deflection. A galvanometer is usually used for measuring the flow of current in the bridge circuit.
Test: DC Bridges (Wheatstone bridge) - Question 24

Resistance R4 is known as ________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 24 R4 is the unknown resistance whose value has to be found by comparison with a standard. R3 is known as the standard resistance. The resistance arm comprises four resistances, including R1, R2, R3, and R4.
Test: DC Bridges (Wheatstone bridge) - Question 25

The balance condition of a Wheatstone bridge depends on the _________.

Detailed Solution for Test: DC Bridges (Wheatstone bridge) - Question 25 The ratio of the arms R1 and R2 determines a Wheatstone bridge’s balance condition. The balance condition is given by the equation R4 = R3R1 / R2.
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