In the circuit shown in figure, the current is to measured. What is the value of the current if the ammeter shown (i) is a galvanometer with a resistance `R_G=60*00Omega`. (ii) is a galvanometer described in (i) but converted to an ammeter by a shunt resistance `r_s=0*02Omega`, (iii) is an ideal ammeter with zero resistance?

In the circuit shown in figure, the current is to measured. What is th

1.	In the circuit shown in figure, the current is to measured. What is the value of the current if the ammeter shown (i) is a galvanometer with a resistance `R_G=6000Omega`. (ii) is a galvanometer described in (i) but converted to an ammeter by a shunt resistance `r_s=002Omega`, (iii) is an ideal ammeter with zero resistance?
Answer» Let G be the resistance of ammeter (i.e. galvanometer). Then current in the circuit, `I=(epsilon)/(R+G)=(300)/(300+6000)=0048A`. (ii) When the ammeter (i.e., galvanometer) is shunted with resistance S, its effective resistance, `R_p=(GS)/(G+S)=(60xx002)/(60+002)~~002Omega` Current in the circuit, `I=(epsilon)/(R+R_p)=(300)/(300+02)~~099A`. (iii) For the ideal ammeter with zero resistance current, `I=(300)/(300)=100A`.

Discussion

No Comment Found

Related InterviewSolutions

A current carrying loop consists of 3 identical quarter circles of radius R, lying in the positive quadrants of the x-y, y-z and z-x planes with their centres at the origin, joined together. Find the direction and magnitude to `vecB` at the origin.
A long straight wire carries a current of `2A`. An electron travels with a velocity of `4xx10^4ms^-1` parallel to the wire `0*1mm` from it, and in a direction opposite to the current. What force does the magnetic field of current exert on the moving electron. Charge on electron `=1*6xx10^(-19)C`.
The variation of magnetic susceptibility `chi` with the temperature T of a ferromagnetic material can be plotted asA. B. C. D.
A wire of length L metre carrying a current of I ampere is bent in the form of a circle. Find its magnetic moment.
A wire of length `L metre ` , carrying a current `I `ampere is bent in the form of a circle . The magnitude of its magnetic moment is …………. ` MKS units ` .A. `(IL)/(4pi)`B. `(IL^(2))/(4pi)`C. `(I^(2)L^(2))/(4pi)`D. `(I^(2)L)/(4pi)`
A wire of length `L metre ` , carrying a current `I `ampere is bent in the form of a circle . The magnitude of its magnetic moment is …………. ` MKS units ` .
A long wire carries a steady curent . It is bent into a circle of one turn and the magnetic field at the centre of the coil is `B`. It is then bent into a circular loop of `n` turns. The magnetic field at the centre of the coil will beA. nBB. `n^(2)B`C. 2nBD. `2n^(2)B`
A long solenoid has a radius `a` and number of turns per unit length is `n`. If it carries a current i, then the magnetic field on its axis is directly proportional toA. `ani`B. `ni`C. `(ni)/a`D. `n^(2)i`
Two concentric circular coils of ten turns each are situated in the same plane. Their radii are `20` and `40 cm` and they carry respectively `0.2` and `0.3` ampere current in opposite direction. The magnetic field in `Wb//m^(3)` at the centre isA. `35/4 mu_(0)`B. `(mu_(0))/80`C. `7/80 mu_(0)`D. `5/4 mu_(0)`
A particle of mass `m` and charge `q` moves with a constant velocity `v` along the positive `x` direction. It enters a region containing a uniform magnetic field `B` directed along the negative `z` direction, extending from `x = a` to `x = b`. The minimum value of `v` required so that the particle can just enter the region `x gt b` isA. `qb B//m`B. `q(b-a)B//m`C. `qa B//m`D. `a(b+a)B//2m`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment