AP EAMCET · PHYSICS · Current Electricity
In the circuit, the cells are having negligible resistances. If the galvanometer shows null defection then the value of ' \(\mathrm{V}\) ' is
- A \(12 \mathrm{~V}\)
- B \(6 \mathrm{~V}\)
- C \(4 \mathrm{~V}\)
- D \(2 \mathrm{~V}\)
Answer & Solution
Correct Answer
(D) \(2 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
Apply the Kirchoff law \(\begin{aligned} & -12+500 \mathrm{i}+100 \mathrm{i}=0 \\ & 600 \mathrm{i}=12 \\ & \mathrm{i}=\frac{12}{600}=0.02 \mathrm{~A} \\ & \mathrm{~V}=\mathrm{iR}=100 \times 0.02=2 \mathrm{~V} \end{aligned}\)
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 light wave has a frequency of \(4 \times 10^{14} \mathrm{~Hz}\) and a wavelength of \(5 \times 10^{-7} \mathrm{~m}\) in a medium. The refractive index of the medium isAP EAMCET 2020 Easy
- A body executes simple harmonic motion with an amplitude \(A\). At what displacement, from the mean position, is the potential energy of the body one fourth of its total energy?AP EAMCET 2020 Easy
- An inductor and a resistor are connected in series to an ac source of variable frequency. When the frequency of the applied ac is \(50 \mathrm{~Hz}\), the power factor of the circuit is \(\frac{\sqrt{3}}{2}\). If the frequency of the ac is increased by \(200 \%\), the power factor of the circuit is ____.AP EAMCET 2017 Easy
- Three rods \(A B, B C\) and \(B D\) made of the same material and having the same cross-section have been joined as shown in the figure.
The ends \(A, C\) and \(D\) are held at temperatures of \(20^{\circ} \mathrm{C}, 80^{\circ} \mathrm{C}\) and \(80^{\circ} \mathrm{C}\) respectively. If each rod is of same length, then the temperature at the junction \(B\) of the three rods isAP EAMCET 2010 Easy - Two particles of masses \(1 \mathrm{~g}\) and \(2 \mathrm{~g}\) move towards each other with velocities \(10 \mathrm{~ms}^{-1}\) and \(20 \mathrm{~ms}^{-1}\) respectively. The velocity of the centre of mass of the system of the two particles isAP EAMCET 2023 Easy
- Assertion (A)When proton and a neutron enter into a transverse magnetic field with equal speeds, then they trace a circular paths of equal radii.
Reason (R) In a transverse magnetic field the period of revolution of a charged particle in a circular path is directly proportional to the mass of the particle.AP EAMCET 2019 Easy
More PYQs from AP EAMCET
- Two point sources \(S_1\) and \(S_2\) separated by a distance \(10 \mu \mathrm{m}\) emit light waves of wavelength \(4 \mu \mathrm{m}\) in phase. A circular wire of radius \(40 \mu \mathrm{m}\) is placed around the sources as shown in figure, then ( \(O\) is the centre of the circle and \(O S_1=O S_2\) )
AP EAMCET 2018 Medium - A moving Hydrogen atom makes a head on collision with a stationary Hydrogen atom. Before collision both atoms are in ground state and after collission they move together. The minimum kinetic energy of the moving Hydrogen atom, such that one of the atoms reaches the excitation state isAP EAMCET 2018 Medium
- Let be any point on the ellipse be a focus, be the corresponding directrix and be the perpendicular distance from to directrix . ThenAP EAMCET 2019 Easy
- The direction cosines of a line are \(\left\langle\frac{-9}{11}, \frac{6}{11}, \frac{-2}{11}\right\rangle\) respectively. Then its direction ratios areAP EAMCET 2020 Easy
- If bullets are fired in all possible directions from same point with equal velocity of \(10 \mathrm{~m} \mathrm{~s}^{-1}\) and with an angle of projection \(45^{\circ}\), then the area covered by the bullets on the ground is nearly
(Acceleration due to gravity \(10 \mathrm{~m} \mathrm{~s}^{-2}\) )AP EAMCET 2025 Medium - The line joining the points \(A(2,0)\) and \(B(3,1)\) is rotated through an angle of \(45^{\circ}\), about \(A\) in the anti-clockwise direction. The coordinates of \(B\) in the new positionAP EAMCET 2011 Hard