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A galvanometer coil has a resistance of 15 ohm and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6 A,
Options
(a) 10 mΩ resistance is to be connected in parallel to the galvanometer
(b) 10 mΩ resistance is to be connected in series with the galvanometer
(c) 0.1 Ω resistance is to be connected in parallel to the galvanometer
(d) 0.1 Ω resistance is to be connected in series with the galvanometer
Correct Answer:
10 mΩ resistance is to be connected in parallel to the galvanometer
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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(96)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A solid sylinder of mass 3 kg is rolling on a horizontal surface with velocity 4 ms⁻¹
- A cricket ball of mass 250 g collides with a bat with velocity 10 m/s
- What are the unit of K = 1 / (4 π ?￢ﾂﾒ)
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- Two masses of 9 g and 6 g are connected with a string which is passing over a frictionless
Topics: Alternating Current (96)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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Given :-
G=15ohm Ig=4mA =0.004A.
I=6A. A shunt resistor of resistance S is to be connected in parallel with the galvanometer to convert it into an ammeter . The value of S is given by – S = Ig×G / I-Ig.
= 0.004 ×15 / 6-0.004. S= 0.06/5.996 = 0.01ohm =10m ohm.