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Class 12 NEET Physics Current Electricity Questions Part 1
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© examsnet.com
Question : 6
Total: 100
A circuit contains an ammeter, a battery of
30
V
and a resistance
40.8
ohm
all connected in series. If the ammeter has a coil of resistance
480
ohm
and a shunt of
20
ohm
, the reading in the ammeter will be
[NEET 2015]
2
A
1
A
0.5
A
0.25
A
Validate
Solution:
👈: Video Solution
From circuit diagram
Resistance of ammeter
=
480
×
20
480
+
20
=
19.2
Ω
Total resistance
R
=
40.8
+
19.2
=
60
Ω
Reading in the ammeter
i
=
V
R
=
30
40.8
+
19.2
=
0.5
A
© examsnet.com
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