TS EAMCET · Physics · Current Electricity
The lengths of two wires made of the same material are in the ratio \(2: 3\) and their radii are in the ratio \(1: 2\). If the two wires are connected in parallel to a battery, then the ratio of the drift velocities of free electrons in the two wires is
- A \(2: 1\)
- B \(3: 1\)
- C \(3: 2\)
- D \(3: 4\)
Answer & Solution
Correct Answer
(C) \(3: 2\)
Step-by-step Solution
Detailed explanation
\(v_d = \frac{I}{neA}\) \(I = \frac{V}{R}\) and \(R = \frac{\rho L}{A}\) \(v_d = \frac{V/R}{neA} = \frac{V}{(\rho L/A)neA} = \frac{V}{ne\rho L}\) \(\frac{v_{d1}}{v_{d2}} = \frac{L_2}{L_1}\) \(\frac{v_{d1}}{v_{d2}} = \frac{3}{2}\)
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 man walking along a straight line with a velocity \(6 \mathrm{~km} / \mathrm{h}\) encounters rain falling vertically down with a velocity \(6 \sqrt{3} \mathrm{~km} / \mathrm{h}\). At what angle the man should hold his umbrella so that he can protect himself from rainTS EAMCET 2022 Easy
- The error in the measurement of the length and the breadth of a rectangular table is \(1 \%\). If the length and breadth of the table are \(1 \mathrm{~m}\) and \(50 \mathrm{~cm}\) respectively, then the area of the table including error isTS EAMCET 2021 Easy
- 176 grams of \(\mathrm{CO}_2\) can change its temperature from \(0^{\circ} \mathrm{C}\) to \(30^{\circ} \mathrm{C}\) by absorbing 3600 joules of thermal energy. Molar specific heat of \(\mathrm{CO}_2\) in \(\mathrm{J} \mathrm{mol}^{-1} \mathrm{~K}^{-1}\) isTS EAMCET 2022 Easy
- Two charges \(+q\) and \(-q\) are kept apart. Then at any point on the right bisector of line joining the two chargesTS EAMCET 2008 Easy
- The work done in blowing a soap bubble of diameter 3 cm is (Surface tension of soap solution \(=0.035 \mathrm{Nm}^{-1}\) )TS EAMCET 2025 Medium
- A small object is thrown at an angle \(45^{\circ}\) to the horizontal with an initial velocity \(\mathbf{v}_0\). The velocity is averaged for first \(\sqrt{2} \mathrm{~s}\) and the magnitude of average velocity comes out to be same as that of initial velocity, i.e. \(\left|\mathbf{v}_{\mathrm{o}}\right|\). The magnitude \(\left|\mathbf{v}_0\right|\) will be (take, \(g=10 \mathrm{~m} / \mathrm{s}^2\) )TS EAMCET 2018 Medium
More PYQs from TS EAMCET
- A body mass of \(1 \mathrm{~kg}\), initially at rest explodes and breaks into three parts. The masses of the parts are in the ratio \(1: 1: 3\). The two pieces of equal mass fly off perpendicular to each other with a speed of \(30 \mathrm{~m} / \mathrm{s}\) each. The velocity of the heavier part in \(\mathrm{m} / \mathrm{s}\) isTS EAMCET 2015 Easy
- Two cars \(A\) and \(B\) are moving with speeds \(v_A=120 \mathrm{~km} / \mathrm{h}\) and \(v_B=50 \mathrm{~km} / \mathrm{h}\) respectively in the directions as indicated by the arrow in the figure below. What is the relative speed of the car \(B\) with respect to car \(A\) ?
TS EAMCET 2020 Easy - Consider the following statements A and B and identify the correct answers given below. A. Peltier coefficient is numerically equal to the potential difference across the junctions of the thermocouple through which current is flowing. B. According to Thomson, energy is neither absorbed nor evolved at the junction of a thermocouple but is observed or evolved only along the lengths of both the conductors.TS EAMCET 2005 Hard
- The diameter of the objective of a telescope is 3.6 m . The limit of resolution of the telescope for a light of wavelength 540 nm isTS EAMCET 2024 Medium
- A solenoid of 1000 turns per metre has a core of material with relative permeability 400. The windings of the solenoid are insulated from the core and a current of 2 A is passed through the solenoid. Then the value of the magnetic intensity inside the solenoid isTS EAMCET 2025 Medium
- If the heat required to increase the rms speed of 4 moles of a diatomic gas from \(v\) to \(\sqrt{3} \mathrm{v}\) is 83.1 kJ, then the initial temperature of the gas is (Universal gas constant \(=8.31 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\) )TS EAMCET 2025 Medium