Embibe Experts Solutions for Chapter: Current Electricity, Exercise 1: MHT-CET 2018

In the following network, $I_1=-0.4 \mathrm{A}, I_4=1 \mathrm{A}$  and $I_5=0.4 \mathrm{A}.$ The values of $I_2, I_3$ and $I_6$ respectively are

In the given electrical circuit, which one of the following equation is a correct equation?

In the following network, the current flowing through $15 \mathrm{\Omega }$ resistance is

In meter bridge experiment, to minimize an error due to contact resistance,

With a resistance of $X$ in the left gap and a resistance of $9 \mathrm{\Omega }$ in the right gap of meter bridge, the balance point is obtained at $40 \mathrm{cm}$ from the left end. In what way and to which resistance $3 \mathrm{\Omega }$ resistance be connected to obtained the balance at $50 \mathrm{cm}$ from the left end?

Two unknown resistances are connected in two gaps of a meter-bridge. The null point is obtained at $40 \mathrm{cm}$ from left end. A $30 \mathrm{\Omega }$ resistance is connected in series with the smaller of the two resistances, the null point shifts by $20 \mathrm{cm}$ to the right end. The value of smaller resistance in $\mathrm{\Omega }$ is

The length of a potentiometer wire is $L.$ A  cell of e.m.f. $E$ is balanced at a length $\frac{L}{5}$ from the positive end of the wire. If the length of the wire is increased by $\frac{L}{2}$, at what distance will the same cell give a balance point?

Two wires $A$ and $B$ of equal lengths are connected in left and right gaps, of meter bridge, respectively. The null point is obtained at $40 \mathrm{cm}$ from left end. Diameters of the wires $A$ and $B$ are in the ratio $3:1$ , the ratio of specific resistance of $A$ to that of $B$ is