Electrical Instruments
PHXII03:CURRENT ELECTRICITY

357354 In a Wheatstone bridge all the four arms have equal resistance \(R\). If the resistance of galvanometer arm is also \(R\), the equivalent resistance of combination is

1 \(2\,R\)
2 \(R{\rm{/}}4\)
3 \(R{\rm{/}}2\)
4 \(R\)
PHXII03:CURRENT ELECTRICITY

357355 The equivalent resistance between \(A\) and \(B\) of the network shown in figure
supporting img

1 \(21\,R\)
2 \(11\frac{2}{3}R\)
3 \(\frac{8}{3}R\)
4 \(14\,R\)
PHXII03:CURRENT ELECTRICITY

357356 Which of the following statements is false?

1 Wheatstone bridge is the most sensitive when all the four resistance are of the same order of magnitude.
2 A rheostat can be used as a potential divider.
3 Kirchhoff’s second law represents energy conservation.
4 In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
PHXII03:CURRENT ELECTRICITY

357357 Wheatstone bridge principle is used of measure the specific resistance \(\left(S_{1}\right)\) of given wire, having length \(L\), radius \(r\). If \(X\) is the resistance of wire, then specific resistance is \(; S_{1}=X\left(\dfrac{\pi r^{2}}{L}\right)\). If the length of the wire gets doubled then the value of specific resistance will be :

1 \(S_{1}\)
2 \(2\,\,{S_1}\)
3 \(\dfrac{S_{1}}{2}\)
4 \(\dfrac{S_{1}}{4}\)
PHXII03:CURRENT ELECTRICITY

357354 In a Wheatstone bridge all the four arms have equal resistance \(R\). If the resistance of galvanometer arm is also \(R\), the equivalent resistance of combination is

1 \(2\,R\)
2 \(R{\rm{/}}4\)
3 \(R{\rm{/}}2\)
4 \(R\)
PHXII03:CURRENT ELECTRICITY

357355 The equivalent resistance between \(A\) and \(B\) of the network shown in figure
supporting img

1 \(21\,R\)
2 \(11\frac{2}{3}R\)
3 \(\frac{8}{3}R\)
4 \(14\,R\)
PHXII03:CURRENT ELECTRICITY

357356 Which of the following statements is false?

1 Wheatstone bridge is the most sensitive when all the four resistance are of the same order of magnitude.
2 A rheostat can be used as a potential divider.
3 Kirchhoff’s second law represents energy conservation.
4 In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
PHXII03:CURRENT ELECTRICITY

357357 Wheatstone bridge principle is used of measure the specific resistance \(\left(S_{1}\right)\) of given wire, having length \(L\), radius \(r\). If \(X\) is the resistance of wire, then specific resistance is \(; S_{1}=X\left(\dfrac{\pi r^{2}}{L}\right)\). If the length of the wire gets doubled then the value of specific resistance will be :

1 \(S_{1}\)
2 \(2\,\,{S_1}\)
3 \(\dfrac{S_{1}}{2}\)
4 \(\dfrac{S_{1}}{4}\)
PHXII03:CURRENT ELECTRICITY

357354 In a Wheatstone bridge all the four arms have equal resistance \(R\). If the resistance of galvanometer arm is also \(R\), the equivalent resistance of combination is

1 \(2\,R\)
2 \(R{\rm{/}}4\)
3 \(R{\rm{/}}2\)
4 \(R\)
PHXII03:CURRENT ELECTRICITY

357355 The equivalent resistance between \(A\) and \(B\) of the network shown in figure
supporting img

1 \(21\,R\)
2 \(11\frac{2}{3}R\)
3 \(\frac{8}{3}R\)
4 \(14\,R\)
PHXII03:CURRENT ELECTRICITY

357356 Which of the following statements is false?

1 Wheatstone bridge is the most sensitive when all the four resistance are of the same order of magnitude.
2 A rheostat can be used as a potential divider.
3 Kirchhoff’s second law represents energy conservation.
4 In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
PHXII03:CURRENT ELECTRICITY

357357 Wheatstone bridge principle is used of measure the specific resistance \(\left(S_{1}\right)\) of given wire, having length \(L\), radius \(r\). If \(X\) is the resistance of wire, then specific resistance is \(; S_{1}=X\left(\dfrac{\pi r^{2}}{L}\right)\). If the length of the wire gets doubled then the value of specific resistance will be :

1 \(S_{1}\)
2 \(2\,\,{S_1}\)
3 \(\dfrac{S_{1}}{2}\)
4 \(\dfrac{S_{1}}{4}\)
PHXII03:CURRENT ELECTRICITY

357354 In a Wheatstone bridge all the four arms have equal resistance \(R\). If the resistance of galvanometer arm is also \(R\), the equivalent resistance of combination is

1 \(2\,R\)
2 \(R{\rm{/}}4\)
3 \(R{\rm{/}}2\)
4 \(R\)
PHXII03:CURRENT ELECTRICITY

357355 The equivalent resistance between \(A\) and \(B\) of the network shown in figure
supporting img

1 \(21\,R\)
2 \(11\frac{2}{3}R\)
3 \(\frac{8}{3}R\)
4 \(14\,R\)
PHXII03:CURRENT ELECTRICITY

357356 Which of the following statements is false?

1 Wheatstone bridge is the most sensitive when all the four resistance are of the same order of magnitude.
2 A rheostat can be used as a potential divider.
3 Kirchhoff’s second law represents energy conservation.
4 In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.
PHXII03:CURRENT ELECTRICITY

357357 Wheatstone bridge principle is used of measure the specific resistance \(\left(S_{1}\right)\) of given wire, having length \(L\), radius \(r\). If \(X\) is the resistance of wire, then specific resistance is \(; S_{1}=X\left(\dfrac{\pi r^{2}}{L}\right)\). If the length of the wire gets doubled then the value of specific resistance will be :

1 \(S_{1}\)
2 \(2\,\,{S_1}\)
3 \(\dfrac{S_{1}}{2}\)
4 \(\dfrac{S_{1}}{4}\)