Electronics and Communication Engineering - Measurements and Instrumentation - Discussion
Discussion Forum : Measurements and Instrumentation - Section 1 (Q.No. 24)
24.
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240 x 10-6 N-m on full scale. If B = 1 Wb/m2, range of meter is
Answer: Option
Explanation:
NBAI = Controlling torque or 
= 240 x 10-6 or I = 2 mA.
Discussion:
4 comments Page 1 of 1.
Tataji said:
7 years ago
Deflection Torque (N*B*A*I)= Controlling Torque.
So here N=100.
B=1wb/m^2
A=40mm * 30mm=>120 * 10^-6m
Tc=240 * 10^-6
Then;
I=?
I=(240 * 10^-6)/(100 * 40 * 120 * 10^-6 * 1).
So, I=2mA.
So here N=100.
B=1wb/m^2
A=40mm * 30mm=>120 * 10^-6m
Tc=240 * 10^-6
Then;
I=?
I=(240 * 10^-6)/(100 * 40 * 120 * 10^-6 * 1).
So, I=2mA.
Osas said:
6 years ago
I think it should be 2uA.
Where: I=240*10^-6/(100*1*1200*10^-3).
So, I=2uA.
Where: I=240*10^-6/(100*1*1200*10^-3).
So, I=2uA.
Karthik said:
9 years ago
What is the formula can anybody explain?
Ritesh said:
9 years ago
Torque = B * I * N * A.
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