MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Alternating Current

why a galvano...

Question

why a galvanometer is not used to measure current in a given circuit?

Open in App

Solution

It is because of two reasons...
Firstly, a Galvanometer is a highly current sensitive device which would shows large deflections even with the passage of small amount of currents through it.
Secondly, it has a very high resistance value which can alter the magnitude of current flowing through it.
We can however convert it into an ammeter by shunting it properly.

Suggest Corrections

thumbs-up

1

Similar questions

Q. Assertion :Galvanometer cannot as such be used as an ammeter to measure the value of the current in a given circuit. Reason: Galvanometer gives a full-scale deflection for a current of the order of micro ampere.

50 Ω

resistance is connected to a battery of

5 V

. A galvanometer of resistance

100 Ω

is to be used as an ammeter to measure current through the resistance, for this a resistance

r_{s}

is connected to the galvanometer. Which of the following connections should be employed if the measured current is within

1

% of the current without the ammeter in the circuit?

Q. Assertion :A galvanometer can be used as a voltmeter to measure the voltage across a given section of the circuit. Reason: For this it must be connected in parallel with that section of the circuit.

A cell is used to :

(a) measure current in a circuit

(b) provide current in a circuit

(c) limit current in a circuit

(d) prevent current in a circuit

Q. In the adjacent circuit a resistance R is used. Initially with 'wire AB' not in the circuit, the galvanometer shows a deflection of d divisions. Now, the 'wire AB' is connected parallel to the galvanometer and the galvanometer shows a deflection nearly

d / 2

division. Therefore current sensitivity of the galvanometer is about:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction

PHYSICS

Watch in App

explore_more_icon

Explore more

Alternating Current

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon