AP EAMCET · PHYSICS · Work Power Energy
A motor of power \(P_0\) is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe \(n\) times, the power of the motor is increased to \(P_1\). The ratio of \(P_1\) to \(P_0\) is
- A \(n: 1\)
- B \(n^2: 1\)
- C \(n^3: 1\)
- D \(n^4: 1\)
Answer & Solution
Correct Answer
(A) \(n: 1\)
Step-by-step Solution
Detailed explanation
Power of motor initially \(=P_0\) Let, rate of flow of motor \(=(x)\) \(\text { Since, power, } \begin{aligned} P_0 & =\frac{\text { work }}{\text { time }}=\frac{m g y}{t} \\ & =m g\left(\frac{y}{t}\right), \\ \frac{y}{t} & =x=\text { rate of flow of water } \end{aligned}\) If…
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
- When a monatomic gas expands at constant pressure, the percentages of heat supplied that is used to do external work and to increase its internal energy are respectivelyAP EAMCET 2023 Medium
- A block of mass \(5 \mathrm{~kg}\) moving on a rough surface with a velocity of \(4 \mathrm{~ms}^{-1}\) is stopped by the friction in 2 seconds. Then the coefficient of friction between the contact surfaces is
(Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2023 Easy - The ratio of displacement to distance for a moving particle isAP EAMCET 2020 Easy
- An object is thrown vertically upwards from the surface of the earth with a velocity \(x\) times the escape velocity on the earth \((x < 1)\), then the maximum height to which its rises from the centre of the earth is (radius of earth is \(R\) )AP EAMCET 2018 Hard
- A uniform chain of mass and length is lying on a smooth horizontal table, with half of its length hanging down. The work done is pulling the entire chain up the table isAP EAMCET 2020 Hard
- In Bohr's theory the potential of an electron at a position is \(\frac{K r^2}{2}\), where \(K\) is a constant. Then, the quantised energy of the electron in \(n\)th orbit isAP EAMCET 2020 Easy
More PYQs from AP EAMCET
- Which method is used to purify liquids having very high boiling points and liquids which decompose at or below their boiling point?AP EAMCET 2025 Easy
- The vapors of \(1 \mathrm{~g}\) of an element occupy \(2.5625 \mathrm{~L}\) exerting a pressure of \(0.5 \mathrm{~atm}\) at \(1000 \mathrm{~K}\). What is the molar mass (in \(\mathrm{g} \mathrm{mol}^{-1}\) ) of the element?
(Assume vapors follow ideal gas equation Given \(\mathrm{R}=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\) )AP EAMCET 2023 Medium - If \(\mathrm{f}: \mathbb{R} \rightarrow \mathbb{R}\) is defined by \(\mathrm{f}(\mathrm{x}+\mathrm{y})=\mathrm{f}(\mathrm{x})+\mathrm{f}(\mathrm{y}) \forall \mathrm{x}, \mathrm{y} \in\) \(\mathbb{R}\) and \(f(1)=7\), then \(\sum_{r=1}^n f(r)=\)AP EAMCET 2023 Easy
- Two insulated charged metallic spheres \(P\) and \(Q\) of negligible radii have their centres separated by a distance of \(60 \mathrm{~cm}\). The mutual force of electrostatic repulsion, if the charge on each is \(6 \times 10^{-7} \mathrm{C}\) isAP EAMCET 2021 Medium
- If the variance of \(6,7,8,9,10,11\) is \(\sigma^2\), then the variance of \(12,14,16,18,20,22\) isAP EAMCET 2018 Easy
- The given unit cell belongs to the type
AP EAMCET 2023 Easy