AP EAMCET · PHYSICS · Current Electricity
A uniform conductor of resistance \(R\) is cut into 20 equal pieces. Half of them are joined in series and the remaining half of them are connected in parallel. If the two combinations are joined in series, the effective resistance of all the pieces is
- A \(R\)
- B \(\frac{R}{2}\)
- C \(\frac{101 R}{200}\)
- D \(\frac{201 R}{200}\)
Answer & Solution
Correct Answer
(C) \(\frac{101 R}{200}\)
Step-by-step Solution
Detailed explanation
Resistance of each piece \(=\frac{R}{20} \Omega\) Equivalent resistance of 10 such pieces connected in series \[ R_1=10 \times \frac{R}{20}=\frac{R}{2} \] Similarly, equivalent resistance of 10 such pieces connected in parallel…
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
- A large charged plane having surface charge density \(4.9 \times 10^{-6} \mathrm{C} \mathrm{m}^{-2}\) lies in the \(\mathrm{x}-\mathrm{y}\) plane. A circular plane of radius of \(1 \mathrm{~cm}\) is lying completely in the region where \(\mathrm{x}, \mathrm{y}\) and \(\mathrm{z}\) coordinates are all positive. When the plane's normal makes an angle \(60^{\circ}\) with the z-axis, the electric flux through the circular plane is \(\left(\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right)\)AP EAMCET 2022 Easy
- In a Carnot's engine if the temperatures of the source and the sink are decreased by \(100 \mathrm{~K}\) each then the efficiency of the engineAP EAMCET 2023 Medium
- A horizontal overhead powerline at a height of \(5 \mathrm{~m}\) from the ground and carries a current of \(150 \mathrm{~A}\) from East to West. The magnetic field directly below it on ground isAP EAMCET 2020 Medium
- Two charges each are placed at the comers A and B of an equilateral triangle of side in air. The electric potential at the third comer C isAP EAMCET 2021 Medium
- A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of \(25 \mathrm{~A}\) in a millisecond, is present in the primary coil. If the mutual inductance is \(92 \times 10^{-6} \mathrm{H}\), then the value of induced emf in the secondary coil isAP EAMCET 2012 Easy
- The limit of resolution of an oil immersion objective microscope of numerical aperture 0.8 for light of wavelength \(0.6 \mu \mathrm{m}\) isAP EAMCET 2020 Medium
More PYQs from AP EAMCET
- If \(\lambda_0\) is the de-Broglie wavelength for a proton accelerated through a potential difference of \(100 \mathrm{~V}\), the de-Broglie wavelength for \(\alpha\)-particle accelerated through the same potential difference isAP EAMCET 2002 Hard
- If the equations \(x^2+a x+b=0\) and \(x^2+b x+a=0(a \neq b)\) have a common root, then \(a+b\) is equal toAP EAMCET 2002 Easy
- Let \(A B C D E F\) be a regular hexagon with the vertices \(A, B, C, D, E, F\) counter clockwise. If \(O^{\prime}\) is the center of \(\mathrm{ABCDEF}\), then the vector \(\mathbf{A O}\) is to parallel/equalAP EAMCET 2021 Easy
- \(A\) and \(B\) each select one number at random from the distinct numbers \(1,2,3, \ldots, n\) and the probability that the number selected by \(A\) is less than the number selected by \(B\) is \(\frac{1009}{2019}\). Now, the probability that the number selected by \(B\) is the number immediately next to the number selected by \(A\) isAP EAMCET 2019 Hard
- If the \(E_{\text {cell }}^{\circ}\) of an equilibrium reaction \(A(s)+2 B^{2+}(a q) \rightleftharpoons A^{2+}(a q)+2 B(s)\)
at \(298 \mathrm{~K}\) is \(0.59 \mathrm{~V}\), the equilibrium constant \(K_c\) isAP EAMCET 2019 Easy - The power required for an engine to maintain a constant speed of \(50 \mathrm{~m} \mathrm{~s}^{-1}\) for a train of mass \(3 \times 10^6 \mathrm{~kg}\) on rough rails is
(The coefficient of kinetic friction between the rails and wheels of the train is 0.05 and acceleration due to gravity \(=10 \mathrm{~m} \mathrm{~s}^{-2}\) )AP EAMCET 2025 Medium