JEE Mains · Physics · STD 12 - 3. current electricity
Four resistances of \(15\; \Omega, 12\; \Omega, 4 \;\Omega\) and \(10\; \Omega\) respectively in cyclic order to form Wheats tone's network. The resistance that is to be connected in parallel with the resistance of \(10\; \Omega\) to balance the network is .................. \(\Omega\)
- A \(13\)
- B \(10\)
- C \(7\)
- D \(17\)
Answer & Solution
Correct Answer
(B) \(10\)
Step-by-step Solution
Detailed explanation
Let the resistance to be connected is \(\mathrm{R}\). For balanced wheatstone bridge. \(15 \times 4=12 \times \frac{10 \mathrm{R}}{10+\mathrm{R}}\) \(\Rightarrow \mathrm{R}=10 \Omega\)
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
- \(100\) balls each of mass moving with speed \(v\) simultaneously strike a wall normally and reflected back with same speed, in time \(t s\). The total force exerted by the balls on the wall isJEE Mains 2023 Medium
- \(n-\) \(moles\) of an ideal gas with constant volume heat capacity \(C_v\) undergo an isobaric expansion by certain volume. The ratio of the work done in the process, to the heat supplied isJEE Mains 2019 Medium
- An object ' \(o\) ' is placed at a distance of \(100\,cm\) in front of a concave mirror of radius of curvature \(200\,cm\) as shown in the figure. The object starts moving towards the mirror at a speed \(2\,cm / s\). The position of the image from the mirror after \(10\,s\) will be at ...... \(cm\).
JEE Mains 2022 Hard - A conductor lies along the \(z-\)axis \(a\) \(-1.5\)\( \le Z < 1.5\,m\) carries a fixed current of \(10.0\ A\) in \( - {\hat a_z}\) direction (see figure). For a field \(\vec B\) \(=\) \(3.0 \times 10^{-4}\) \(e^{-0.2x}\) \({\hat a_y}\,T\) find the power required to move the conductor at constant speed to \(x = 2.0\ m, y = 0\ m\) in \(5 \times 10^{-3}\ s\). Assume parallel motion along the \(x-\)axis........\( W\)
JEE Mains 2014 Hard - Unpolarised light of intensity \(32\,Wm ^{-2}\) passes through the combination of three polaroids such that the pass axis of the last polaroid is perpendicular to that of the pass axis of first polaroid. If intensity of emerging light is \(3\,Wm ^{-2}\), then the angle between pass axis of first two polaroids is \(............\,^{\circ}\)JEE Mains 2023 Medium
- From the given transfer characteristic of a transistor in \(CE\) configuration, the value of power gain of this configuration is \(10^{ x }\), for \(R_B=10\,k \Omega\), and \(R _C=1\,k \Omega\). The value of \(x\) is \(.....\).
JEE Mains 2023 Hard
More PYQs from JEE Mains
- If the line \(x = y = z\) intersects the line \(x \sin A+ y\) \(\sin B + z \sin C -18=0= x \sin 2 A + y \sin 2 B + z\) \(\sin 2 C -9\), where \(A , B , C\) are the angles of a triangle \(ABC\), then \(80\left(\sin \frac{ A }{2} \sin \frac{ B }{2} \sin \frac{ C }{2}\right)\) is equal to \(..........\).JEE Mains 2023 Hard
- All the points in the set \(S\, = \left\{ {\frac{{\alpha \, + \,i}}{{\alpha \, - \,i}}\,:\,\alpha \, \in \,R} \right\}\,(i\, = \,\sqrt { - 1} )\) lie on aJEE Mains 2019 Hard
- The mirror image of the point \((1,2,3)\) in a plane is \(\left(-\frac{7}{3},-\frac{4}{3},-\frac{1}{3}\right) .\) Which of the following points lies on this plane ?JEE Mains 2020 Hard
- Let a line L passing through the point P(1, 1, 1) be perpendicular to the lines \(\frac{x-4}{4}=\frac{y-1}{1}=\frac{z-1}{1}\) and \(\frac{ x -17}{1}=\frac{ y -71}{1}=\frac{ z }{0}\). Let the line L intersect the yz-plane at the point Q. Another line parallel to L and passing through the point S(1,0, –1) intersects the yz-plane at the point R. Then the square of the area of the parallelogram PQRS is equal to ___ .JEE Mains 2026 Hard
- The area (in sq. units) of the region described by \(A = \{ (x,y)|y \ge {x^2} - 5x + 4,\,x + y \ge 1,\,y \le 0\} \) isJEE Mains 2016 Hard
- The number of solutions of the equation \(2 \theta-\cos ^{2} \theta+\sqrt{2}=0\) is \(R\) is equal toJEE Mains 2022 Hard