A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 Ω all connected in series. If the ammeter has a coil of resistance 480 Ω and a shunt 20 Ω then reading in the ammeter will be

0.5 A

0.25 A

2 A

1 A

Solution

0.5 A

Eeffective resistance of a circuit,

$space straight R subscript eff space equals space 40.8 space plus fraction numerator 480 space straight x space 20 over denominator 480 plus 20 end fraction equals space 40.8 space plus space 19.2 space equals space 60 space straight capital omega So comma space current space flowing space across space ammeter comma straight I space equals space space straight V over straight R space equals space 30 over 60 space equals space 1 half space equals space 0.5 space straight A Hence comma space reading space of space ammeter space equals space 0.5 space straight A$

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Current Electricity

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 Ω all connected in series. If the ammeter has a coil of resistance 480 Ω and a shunt 20 Ω then reading in the ammeter will be

0.5 A

0.25 A

2 A

1 A

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For Daily Free Study Material Join wiredfaculty

Current Electricity

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 Ω all connected in series. If the ammeter has a coil of resistance 480 Ω and a shunt 20 Ω then reading in the ammeter will be 0.5 A 0.25 A 2 A 1 A

Some More Questions From Current Electricity Chapter

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 Ω all connected in series. If the ammeter has a coil of resistance 480 Ω and a shunt 20 Ω then reading in the ammeter will be

0.5 A

0.25 A

2 A

1 A