Physics, asked by manissaha129, 9 months ago

in an ammeter 4%of the mains current is passing through galvanometer. If the galvanometer is shunted with a 3ohm resistance.
a)116 ohm
b)117 ohm
c)118 ohm
d)120 ohm

Answers

Answered by Itzgoldenking

Answer:

if the galvanometer is shunted with a3 ohm resistance in an ammeter 4%of the mains currenr is passing through galvanometer.

120ohm and mark me as the brainliest

Explanation:

Answered by heartbroken84

Answer:

ANSWER

Shunt is a low resistance connected in parallel with the galvanometer or ammeter.

If the current flowing in a circuit is strong, a galvanometer or an ammeter cannot be put directly in it because the instrument may be damaged. To overcome this difficulty, a low resistance (ie, shunt) is connected in parallel with this instrument. Then a major portion of the current passes through this low resistance (ie, shunt) and only a small portion passes through the instrument. Due to it, the galvanometer or an ammeter remains safe.

Shunt is given by

I−I

∴5=

I−

100

or G=

96×5

=120Ω

solution

Answered By

toppr

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in an ammeter 4%of the mains current is passing through galvanometer. If the galvanometer is shunted with a 3ohm resistance.a)116 ohmb)117 ohmc)118 ohmd)120 ohm​

Answers

in an ammeter 4%of the mains current is passing through galvanometer. If the galvanometer is shunted with a 3ohm resistance.
a)116 ohm
b)117 ohm
c)118 ohm
d)120 ohm