मराठी

Define current sensitivity of a galvanometer. - Physics

Advertisements
Advertisements

प्रश्न

Define current sensitivity of a galvanometer.

टीपा लिहा

उत्तर

Current sensitivity of a galvanometer is defined as the deflection produced in the galvanometer when a unit current flows through it.

θ = `("nBA")/"k""I"`

So, for a given value of I, θ will be large if `("nBA")/"k"` is large i.e n, B and A should be large and k should be small.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2015-2016 (March) Foreign Set 2

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

Show that the current flowing through a moving coil galvanometer is directly proportional to the angle of deflection of coil.


Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity. Explain, giving reason.


Explain how moving coil galvanometer is converted into a voltmeter. Derive the necessary formula.


A galvanometer has a resistance of 16Ω. It shows full scale deflection, when a current of 20 mA is passed through it. The only shunt resistance available is 0.06  which is not appropriate to convert a galvanometer into an ammeter. How much resistance should be connected in series with the coil of galvanometer, so that the range of ammeter is 8 A?


Why is it necessary to introduce a radial magnetic field inside the coil of a galvanometer?


Write current sensitivity of a galvanomete S.I. unit. 


A galvanometer having a coil resistance of 60 Ω shows full-scale deflection when a current of 1.0 amp passes through it. It can be converted into an ammeter to read currents up to 5.0 amp by:


In an ammeter 0.5% of main current passes through galvanometer; If resistance of galvanometer is G, the resistance of ammeter will be.


A multirange voltmeter can be constructed by using a galvanometer circuit as shown in figure. We want to construct a voltmeter that can measure 2V, 20V and 200V using a galvanometer of resistance 10Ω and that produces maximum deflection for current of 1 mA. Find R1, R2 and R3 that have to be used.


To convert a moving coil galvanometer into an ammeter we need to connect a ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×