AP EAMCET · PHYSICS · Magnetic Effects of Current
The coil of a moving coil galvanometer has an effective area of \(4 \times 10^{-2} \mathrm{~m}^2\). It is suspended in a magnetic field of \(5 \times 10^{-2} \mathrm{~Wb} \mathrm{~m}^{-2}\). If the deflection in the galvanometer coil is \(0.2 \mathrm{rad}\), when a current of \(5 \mathrm{~mA}\) is passed through it, then
- A torsional constant is \(8 \times 10^{-5} \mathrm{~N} \mathrm{~m} \mathrm{rad}^{-1}\)
- B current sensitivity is \(40 \mathrm{rad} \mathrm{A}^{-1}\)
- C torsional constant is \(3 \times 10^{-3} \mathrm{~N} \mathrm{~m} \mathrm{rad}^{-1}\)
- D current sensitivity is \(40 \operatorname{deg} A^{-1}\)
Answer & Solution
Correct Answer
(B) current sensitivity is \(40 \mathrm{rad} \mathrm{A}^{-1}\)
Step-by-step Solution
Detailed explanation
Given that, for a moving coil galvanometer, Effective area, \(A=4 \times 10^{-2} \mathrm{~m}^2\) Magnetic field, \(B=5 \times 10^{-2} \mathrm{Wbm}^{-2}\) Angle of deflection, \(\phi=0.2 \mathrm{rad}\) Electric current, \(I=5 \mathrm{~mA}=5 \times 10^{-3} \mathrm{~A}\) By using…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- An electron in a hydrogen atom undergoes a transition from a higher energy level to a lower energy level. The incorrect statement of the following isAP EAMCET 2016 Easy
- A point source of electromagnetic radiation has an average power output of \(960 \mathrm{~W}\). The peak value of the electric field at a distance \(400 \mathrm{~cm}\) from the source isAP EAMCET 2019 Easy
- An imaginary equilateral triangle of side length is placed in a uniform electric field as shown. Then.
AP EAMCET 2020 Hard - A ball is thrown vertically down from a height of \(40 \mathrm{~m}\) from the ground with an initial velocity \(v\). The ball hits the ground, loses \(\frac{1}{3}\) rd of its total mechanical energy and rebounds back to the same height. If the acceleration due to gravity is \(10 \mathrm{~ms}^{-2}\), then the value of \(v\) isAP EAMCET 2016 Medium
- At a given instant of time the position vector of a particle moving in a circle with a velocity \(3 \hat{\mathbf{i}}-4 \hat{\mathbf{j}}+5 \hat{\mathbf{k}}\) is \(\hat{\mathbf{i}}+9 \hat{\mathbf{j}}-3 \hat{\mathbf{k}}\). Its angular velocity at that time isAP EAMCET 2005 Medium
- Two smooth inclined planes \(A\) and \(B\) each of height 20 m have angles of inclination \(30^{\circ}\) and \(60^{\circ}\) respectively. If \(t_1\) and \(t_2\) are respectively the times taken by two blocks to reach the bottom of the planes \(A\) and \(B\) from the top, then \(t_1-t_2=\) (Acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-2}\) )AP EAMCET 2025 Medium
More PYQs from AP EAMCET
- If \(1-\cot 23^{\circ}=\frac{x}{1-\cot 22^{\circ}}\), then \(x=\)AP EAMCET 2022 Medium
- If the point \((1,1)\) and the origin lie in the same region with respect to the hyperbola \(\frac{x^2}{a^2}-\frac{y^2}{1}=1(a>0)\), then the range of a isAP EAMCET 2023 Easy
- When \(\mathrm{SbF}_5\) reacts with \(\mathrm{XeF}_4\) to form an adduct, the shapes of cation and anion in the adduct respectively areAP EAMCET 2020 Medium
- Let be non zero real numbers such that and given and ( is a unit matrix), then the equation whose roots are and isAP EAMCET 2021 Easy
- In an amplitude modulated signal the maximum amplitude is and minimum amplitude is . The amplitude of modulating wave will beAP EAMCET 2021 Easy
- A coordination compound is made of \(\mathrm{Co}^{3+}\), \(\mathrm{NH}_3\), and \(\mathrm{Cl}^{-}, 0.1 \mathrm{M}\) solution of this complex when treated with excess silver nitrate gave no precipitate. The formula of the complex and secondary valency of metal are respectively.AP EAMCET 2018 Easy