MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details
Get extra R 560 off
USE CODE: MOB20

				   

How can a galvanometer be converted into a ammeter and voltmeter?plz explain?

5 years ago

Share

Answers : (1)

										

CONVERSION OF GALVANOMETER 
INTO AMMETER


  Since Galvanometer is a very sensitive instrument therefore it can’t measure heavy currents. In order to     convert a Galvanometer into an Ammeter, a very low resistance known as "shunt" resistance is     connected in parallel to Galvanometer. Value of shunt is so adjusted that most of the current passes     through the shunt. In this way a Galvanometer is converted into Ammeter and can measure heavy     currents without fully deflected.










VALUE OF SHUNT RESISTANCE

 
















Let resistance of galvanometer = Rg and it gives full-scale deflection when current Ig is passed through     it. Then,

Vg = IgRg -------(i)

    Let a shunt of resistance (Rs) is connected in parallel to galvanometer. If total current through the     circuit is I.



























Then current through shunt:

Is = (I-Ig)

    potential difference across the shunt:

Vs= IsRs


or 
              Vs = (I – Ig)Rs -------(ii)

    But

V=Vg
(I - Ig)Rs = IgR



CONVERSION OF GALVANOMETER INTO VOLTMETER


Since Galvanometer is a very sensitive instrument, therefore it can not measure high potential     difference. In order to convert a Galvanometer into voltmeter, a very high resistance known as "series     resistance" is connected in series with the galvanometer.


VALUE OF SERIES RESISTANCE























 Let resistance of galvanometer = Rg and resistance R(high) is connected in series to it. Then     combined resistance = (R+ Rx).


    If potential between the points to be measured = V and if galvanometer gives full-scale deflection,     when current "Ig" passes through it. Then,
 

V = Ig (Rg + Rx
V = IgR+ IgRx 
V – IgR= IgRx 
Rx = (V – IgRg)/Ig


    Thus Rx can be found.


5 years ago

Post Your Answer

Other Related Questions on Electric Current

a fuse wire has___________resistance and _________ melting point MORE OR LESSS?????
 
 
A fuse wire is an electrical instrument used for reducing the damage of electrical appliances when a high current passses into the wire. A fuse wire should have more resistance and a low...
 
2017 years ago
What is kirchoffs loop rule? Please give explanation.
 
 
Kirchoff’s loop rule or Kirchoff’s voltage law or Kirchoff’s second law states that the algebraic sum of voltage drops in any sets of branches forming a closed circuit or loop is zero. It is...
 
Adarsh 5 months ago
 
Kirchoff’s Loop Rule: Around any circuit loop, apply energy conservation in form of V= Epsilon InRn Voltage or electric potential difference is the potential energy per unit charge. So, any...
 
dolly bhatia 5 months ago
 
Kirchoff’s Loop Rule: Around any circuit loop, apply energy conservation in form of V= lambda lnRn Voltage or electric potential difference is the potential energy per unit charge. So, any...
 
dolly bhatia 5 months ago
WHY IS ELECTRIC CURRENT SAID TO BE OPPOSITE TO THE DIRECTION OF FLOW OF ELECTRONS?
 
 
Current is defined as the flow of electrons within a conducting material like copper electrical wire. In metallic solids, like copper wire, electrons flow from a low potential to a high...
 
dolly bhatia 5 months ago
 
@ siddharth actually the thing is taken by means of concention , there is no logic here . when scientist was doing theexperiment on electric current , at that time , the current moves from...
 
Umakant biswal 5 months ago
 
Even before the discovery of the electron the direction of current is taken to be from +ve to -ve terminal outside the battery or cell. But when the electron was discovered, the scientists...
 
Adarsh 5 months ago
what is work energy thereom...................................?
 
 
The work-energy theorem is a generalized description of motion which states that work done by the sum of all forces acting on an object is equal to change in that object’s kinetic energy....
 
dolly bhatia one month ago
 
The work W done by the net force on a particle equals the change in the particle`s kinetic energy KE: W = Δ K E = 1 2 m v f 2 − 1 2 m v i 2 . The work-energy theorem can be derived from...
 
Sushmit Trivedi one month ago
 
For any net force acting on a particle moving along any curvilinear path, it can be demonstrated that its work equals the change in the kinetic energy of the particle by a simple derivation...
 
rahul kushwaha 3 months ago
The cieling of long hall is 25 m high What is the maximum horizontal distance that a ball thrown with a speed of 40 ms can go without hitting the ceiling of wall? Plz explain with a DIAGRAM
 
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 40*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Let the angle of throwing be Q with respect to the ground So, the range is R = 30*cosQ*t where t = time taken reach ground. Now, we know the time taken to reach the top of its flight is half...
 
Tapas Khanda 5 months ago
 
Diagram is not required to solve this question. You can directly use the formula to find range : R = (v^2/g)*sin2Q Maximum height reached, H = v^2*sin^2Q/2g So, 25 = 40^2*sin^2Q/(2*9.8) So,...
 
Tapas Khanda 5 months ago
What harmfull gases are produced when we burn plastics? And can we burn plastics?
 
 
I`m doing a project, can someone help me, How to reduce those toxic contents when plantic are burnt Like sulphur, nitrogen etc
 
2017 years ago
 
nitrogen gas , sulphur dioxide ,carbon monoxide , carbon dioxide. are some of the gases. well burning plastic is not good for living things. but there are many other things that are more...
 
2 days ago
View all Questions »

  • Complete Physics Course - Class 12
  • OFFERED PRICE: R 2,600
  • View Details
Get extra R 520 off
USE CODE: MOB20

  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details

Get extra R 560 off
USE CODE: MOB20

More Questions On Electric Current

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details