BARC-2018 EC: Electronics Measurement Quiz 3
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Question 1
Question 2
Question 3
The coil of a PMMC instrument has 60 turns, on a former that is 18 mm wide, the effective length of the conductor being 25 mm. It moves in a uniform field of flux density 0.5 Tesla. The control spring constant is 1.5 × 10-6 Nm/degree. Calculate the current required to produce a deflection of 100 degree?
Question 4
Determine the number of turns required to produce an angular deflection of 60° when a current of 4 mA flowing through the coil if a PMMC instrument have a coil of dimension 12 mm x 10 mm and the flux density in an air gap is 1.2 x 10-3 Tesla and the spring constant is 0.10 x10-6 N-m/rad.
Question 5
The coil of PMMC meter has 60 turns on a force i.e., 18 mm wide, the effective length of the conductor being 25mm. It moves in a uniform field flux density of 0.5 tesla. The control spring constant i 1.5x10-6 N-m/degree. Calculate the current required to produce a deflection of 100°C
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