Uniform Scale Identification
The question asks to identify the control mechanism that results in a uniform scale in measuring instruments. A uniform scale means the divisions are equally spaced, implying a linear relationship between the measured quantity and the instrument's deflection.
Control Mechanisms and Scale Uniformity
Let's analyze the options based on how they provide controlling torque ($\tau_c$) and its relationship with the deflection angle ($\theta$):
- Spring Control: The controlling torque provided by a spring is directly proportional to the angle of deflection. Mathematically, $\tau_c \propto \theta$. If the deflecting torque ($\tau_d$) is also proportional to the quantity being measured (e.g., current $I$), then at equilibrium ($\tau_d = \tau_c$), the deflection angle $\theta$ is directly proportional to the measured quantity ($I \propto \theta$). This results in a uniform scale.
- Gravity Control: This method uses gravity. The controlling torque is proportional to the sine of the deflection angle, $\tau_c \propto \sin\theta$. This leads to a non-linear relationship between the measured quantity and deflection, resulting in a non-uniform scale, particularly compressed at the beginning.
- Air Damping & Eddy Current Damping: These methods are primarily used for damping oscillations to bring the pointer quickly to its final position. They do not provide the necessary controlling torque to determine the scale's linearity. Scale linearity depends on the *control* mechanism, not the *damping* mechanism.
Conclusion on Uniform Scale
Based on the analysis, the spring control mechanism provides a controlling torque proportional to deflection, which is essential for achieving a uniform scale.
Therefore, Spring Control is the mechanism that has a uniform scale.
Similar Questions
- If $A \in R_{n \times n}$; $\det A=0$, then :
A. A is non singular and the rows and columns of A are linearly independent
B. A is non-singular and the rows and columns of A are linearly dependent
C. A is non-singular and A has one zero rows
D. A is singular
E. A is singular and rows and columns of A are linearly dependent
Choose the correct answer from the options given below : - The matrix equation $AX=0$, represents :
- The greatest rate of increase of $f = xy^{2}z^{3}$ at the point $(0, -1, -2)$ is :
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- If A is a null Matrix, then its rank is :
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : If $u = xy f\left(\frac{y}{x}\right)$, then $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y} = 2u$
Reason (R) : Given function u is homogeneous of degree 2 in $x$ and $y$.
In the light of the above statements, choose the most appropriate answer from the options given below : - Solving a second order Differential equation using Laplace transform :
A. Partial fraction expansion
B. Apply initial conditions in Laplace domain
C. Take Laplace transform of differential equation
D. Obtain time domain solution
Choose the correct answer from the options given below : - Determining Eigenvalues of a matrix :
A. Solve the characteristic equation
B. Form matrix $A - \lambda I$
C. Compute determinant
D. Identify eigenvalues
Choose the correct answer from the options given below : - A lag network for compensation normally consists of :
A. R, L and C elements
B. R and L elements
C. R and C elements
D. R only
E. L only
Choose the correct answer from the options given below :
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
