Measurement of Resistance and A.C Bridges · Electrical and Electronics Measurement · GATE EE

Marks 1

A balanced Wheatsone bridge ABCD has the following arm resistances :

R_AB = 1 k$$\Omega$$ $$\pm$$ 2.1%; R_BC = 100 $$\Omega$$ $$\pm$$ 0.5%; R_CD is an unknown resistance; R_DA = 300 $$\Omega$$ $$\pm$$ 0.4%. The value of R_CD and its accuracy is

GATE EE 2022

Inductance is measured by,

GATE EE 2021

When the Wheatstone bridge shown in the figure is used to find the value of resistor $${R_x},$$ the galvanometer $$G$$ indicates zero current when $${R_1} = 50\,\Omega ,\,\,{R_2} = 65\,\Omega $$ and $$\,{R_3} = 100\,\Omega ,\,\,$$ If $${R_3}$$ is known with $$\, \pm 5\% \,$$ tolerance on its nominal value of $$100\,\Omega .$$ What is the range of $${R_x}$$ in Ohms?

GATE EE 2015 Set 1

The bridge method commonly used for finding mutual inductance is

GATE EE 2012

The bridge circuit shown in the fig below is used for the measurement of an unknown element Z_x. The bridge circuit is best suited when Z_x is a

GATE EE 2011

Kelvin double bridge is best suited for the measurement of

GATE EE 2002

A Kelvin double bridge is best suited for the measurement of

GATE EE 1995

Marks 2

The resistance values of the Wheatstone bridge shown are: $P=2000 \Omega, \mathrm{q}=500 \Omega, R=3000 \Omega$. The battery voltage $E=50 \mathrm{~V}$. The battery has an internal resistance of $1 \Omega$ and the Galvanometer ( $G$ ) has a resistance of $50 \Omega$.

The value of the resistance $S$ for balanced condition is $\_\_\_\_$ $\Omega$. [Answer in integer]

GATE EE 2026

In the Wheatstone bridge shown below, the sensitivity of the bridge in terms of change in balancing voltage $E$ for unit change in the resistance $R$, in $\mathrm{mV} / \Omega$, is _________ (round off to two decimal places)

GATE EE 2025

An unbalanced $$DC$$ Wheatstone bridge is shown in the figure. At what value of $$p$$ will the magnitude of $${V_0}$$ be maximum?

GATE EE 2015 Set 1

In the bridge circuit shown, the capacitors are loss free. At balance, the value of capacitance C₁ in microfarad is ________.

GATE EE 2014 Set 3

A strain gauge forms one arm of the bridge shown in the figure below and has a nominal resistance without any load as $$\,{R_s} = 300\Omega .$$ Other bridge resistance are $$\,{R_1} = {R_2} = {R_3} = 300\Omega .\,\,$$ The maximum permissible current through the strain gauge is $$20$$ $$mA.$$ During certain measurement when the bridge is excited by maximum permissible voltage and the strain gauge resistance is increased by $$1$$% over the nominal value, the output voltage $${V_0}$$ in $$mV$$ is

GATE EE 2013

The Maxwell's bridge shown in the fig. is at balance, the parameters of the inductive coil are

GATE EE 2010

The ac bridge shown in the figure is used to measure the impedance $$Z.$$ If the bridge is balanced for oscillator frequency $$f=2$$ $$kHz$$, then the impedance $$Z$$ will be

GATE EE 2008

A bridge circuit is shown in the figure below. Which one of the sequence given below is most suitable for balancing the bridge?

GATE EE 2008

$${R_1}$$ and $${R_2}$$ are the opposite arms of $${R_3}$$ and $${R_4}$$ of a wheat stone bridge. The source voltage is applied across $${R_1}$$ and $${R_3}$$ under balanced conditions, which one of the following is true?

GATE EE 2006

The items in List $$-$$ $${\rm I}$$ represent the various types of measurements to be made with a reasonable accuracy using a suitable bridge. The items in List $$-$$ $${\rm II}$$ represent the various bridges available for this purpose. Select the correct choice of the item in List $$-$$ $${\rm II}$$ for the corresponding item in List $$-$$ $${\rm I}$$ from the following.

List $$-$$ $${\rm I}$$
$$A.$$ Resistance in the milli Ohm range
$$B.$$ Low values of Capacitance
$$C.$$ Comparison of resistances which are nearly equal
$$D.$$ Inductance of a coil with a large time $$-$$ constant

List $$-$$ $${\rm II}$$
$$1.$$ Wheatstone Bridge
$$2.$$ Kelvin Double Bridge
$$3.$$ Schering Bridge
$$4.$$ Wien's Bridge
$$5.$$ Hay's Bridge
$$6.$$ Carry $$-$$ Foster Bridge

GATE EE 2003