AP EAMCET · PHYSICS · Current Electricity
Resistance of a wire is \(8 \Omega\). It is drawn in such a way that it experiences a longitudinal strain of \(400 \%\). The final resistance of the wire is
- A \(100 \Omega\)
- B \(200 \Omega\)
- C \(300 \Omega\)
- D \(400 \Omega\)
Answer & Solution
Correct Answer
(B) \(200 \Omega\)
Step-by-step Solution
Detailed explanation
\(\mathrm{R}_1=8 \Omega, \varepsilon=\frac{\delta 1}{\mathrm{l}_1}=4 \Rightarrow \delta \mathrm{l}=4 \mathrm{l}_1\) \(\therefore \quad l_2=l_1+81=l_1+4 l_1=5 l_1\) Now, resistance of a wire is given by…
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
- In perfectly inelastic collisions, the relative velocity of the bodiesAP EAMCET 2021 Easy
- The frequency of fifth harmonic of a closed pipe is equal to the frequency of third harmonic of an open pipe. If the length of the open pipe is 72 cm . then the length of the closed pipe isAP EAMCET 2024 Easy
- Two containers \(A\) and \(B\) contain equal volumes of an identical gas at the same pressure and temperature. The gas in container \(A\) is compressed to half its original volume isothermally, while the gas in container \(B\) is compressed to half its original volume adiabatically. The ratio of the final
pressure of gas in container \(B\) to that of gas in container \(A\) isAP EAMCET 2021 Medium - A magnet of magnetic moment \(M\) is rotated through \(360^{\circ}\) in a magnetic field \(H\), the work done will beAP EAMCET 2020 Easy
- For the resultant of two vectors \(\mathbf{A}\) and \(\mathbf{B}\) to maximum, the angle between them should beAP EAMCET 2021 Easy
- Two open organ pipes of lengths \(50 \mathrm{~cm}\) and \(51 \mathrm{~cm}\) are totally immersed in a medium. They are found to give 40 beats in \(10 \mathrm{~s}\) when each is sounding at its fundamental note. The speed of sound in this medium isAP EAMCET 2022 Medium
More PYQs from AP EAMCET
- If \(\theta\) is the angle between the tangents drawn from the point \((2,3)\) to the circle \(x^2+y^2-6 x+4 y+12=0\), then \(\theta=\)AP EAMCET 2024 Easy
- Match the following
The correct answer isList-I (sol) List-II (Method of preparation) A) \(\mathrm{As}_2 \mathrm{S}_3\) III) Hydrolysis B) Au I) Bredig's arc method C) S II) Oxidation D) \(\mathrm{Fe}(\mathrm{OH})_3\) IV) Double decomposition AP EAMCET 2025 Medium - The graph of versus is where is radius of a nucleus, is its mass number, and is constantAP EAMCET 2022 Medium
- In the given circuit, when \(A=1, B=1\) the values of \(X\) and Y respectively are
AP EAMCET 2023 Easy - The colour of \(\mathrm{Mg}(\mathrm{OH})_2\) precipitate formed when it is precipitated in the presence of magneson reagent isAP EAMCET 2022 Easy
- Consider the following statements for a gold sol
(I) It is macromolecular colloid
(II) It is a lyophobic sol
(III)It is a negatively charged sol
(IV) It is a multimolecular colloid
(V) It is an associated colloid
The correct statements areAP EAMCET 2023 Easy