WBJEE · Physics · Current Electricity
The effective resistance between \(A\) and \(B\) in the figure is \(\frac{7}{12} \Omega\) if each side of the cube has \(1 \Omega\) resistance. The effective resistance between the same two points, when the link \(A B\) is removed, is 
- A \(\frac{7}{12} \Omega\)
- B \(\frac{5}{12} \Omega\)
- C \(\frac{7}{5} \Omega\)
- D \(\frac{5}{7} \Omega\)
Answer & Solution
Correct Answer
(C) \(\frac{7}{5} \Omega\)
Step-by-step Solution
Detailed explanation
Let when link AB is removed, \(x\) is an equivalent of remaining part of cube without link. AB and rest part will be in paralel, so according to question…
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 the circuit shown, what will be the current through the \(6 \mathrm{V}\) zener?
WBJEE 2019 Easy - Four cells, each of emf \(E\) and internal resistance \(r,\) are connected in series across an external resistance \(R .\) By mistake one of the cells is connected in reverse. Then the current in the external circuit isWBJEE 2014 Medium
- A projectile thrown with an initial velocity of \(10 \mathrm{ms}^{-1}\) at an angle \(\alpha\) with the horizontal. has a range of \(5 \mathrm{m}\). Taking \(g=10 \mathrm{ms}^{-2}\) and neglecting air resistance, what will he the estimated value of \(\alpha\)?WBJEE 2019 Easy
- To which of the following the angular velocity of the electron in the \(n\) -th Bohr orbit is proportional?WBJEE 2019 Easy
- The poisson's ratio of a material is 0.5 . If a force is applied to a wire of this material, there is a decrease in the cross-sectional area by \(4 \%\). The percentage increase in the length is :WBJEE 2009 Hard
-
Consider two infinitely long wires parallel to Z-axis carrying same current I in the positive Z direction. One wire passes through the point \(L\) at coordinates \((-1,+1)\) and the other wire passes through the point \(M\) at coordinates \((-1,-1)\). The resultant magnetic field at the origin \(\mathrm{O}\) will beWBJEE 2021 Medium
More PYQs from WBJEE
- Supose in a hypothetical world the angular momentum is quantized to be even integral multiples of \(\frac{\mathrm{h}}{2 \pi}\). The largest possible wavelength emitted by hydrogen atoms in visible range in a world according to Bohr's model will be, (Consider hc \(=1242 \mathrm{Mev}-\mathrm{fm}\) )WBJEE 2022 Medium
- A straight line through the point (3,-2) is ndined at an angle \(60^{\circ}\) to the line \(\sqrt{3} x+y=1\). If it intersects the \(X\) -axis, then its equation vill beWBJEE 2019 Medium
- \(0.126 \mathrm{g}\) of an acid is needed to completely neutralise \(20 \mathrm{mL} 0.1\) (N) NaOH solution. The equivalent weight of the acid isWBJEE 2017 Medium
- \(\begin{array}{lllll}\text {The two } & \text { half-cell } & \text { reactions } & \text { of } & \text { an }\end{array}\) electrochemical cell is given as \(\mathrm{Ag}^{+}+e^{-} \longrightarrow \mathrm{Ag} ; \quad E_{\mathrm{Ax}^{+} / \mathrm{Ag}}^{\circ}=-0.3995 \mathrm{V}\) \(\mathrm{Fe}^{3+} \longrightarrow \mathrm{Fe}^{3 *}+e^{-} ; E_{\mathrm{Fe}^{3+} \mathrm{Fv}^{2+}}=-0.7120 \mathrm{V}\). The value of cell EMF will beWBJEE 2014 Medium
- Let \(a>b>0\) and \(f(n)=a^{1 / n}-b^{1 / n}\),\(J(n)=(a-b)^{1 / n}\) for all \(n \geq 2,\) ThenWBJEE 2019 Medium
- If the vertex of the conic \(y^{2}-4 y=4 x-4 a\) always lies between the straight lines \(x+y=3\) and \(2 x+2 y-1=0 .\) thenWBJEE 2015 Medium