Mansi Garg and Jitendra Kumar Solutions for Chapter: Current Electricity, Exercise 4: CHALLENGERS

A resistance of $3 \mathrm{\Omega }$ is connected in series with another resistance of $5 \mathrm{\Omega }$. A potential difference of $6 \mathrm{V}$ is applied across the combination. The value of current through the circuit and potential difference across the $3 \mathrm{\Omega }$ resistance is, respectively.

If an electron revolves in the path of a circle of radius of $0.5 \times {10}^{-10} \mathrm{m}$ at a frequency of $5 \times {10}^{15} \mathrm{cycles}/\mathrm{s}$, then electric current in the circle is.

In the given circuit diagram, the value of total resistance of the circuit is

The circuit diagram shows four identical resistors connected in series with a 12 V battery.

What would be the readings on voltmeters V₁ and V₂?

There are two resistors $R_1$and $R_2 (R_1>R_2)$ and connected through a battery of emf $\mathrm{V}$ volt. Choose the correct option regarding the above statement.

A wire of length $1 \mathrm{m}$ has a resistance of $2 \mathrm{\Omega }$, when connected to a cell, the current in the wire is $3 \mathrm{A}$.

$2 \mathrm{m}$ length of the same wire is connected to the same cell.

What is the resistance of the wire and the current in it?

Which two resistor combinations have the same effective resistance between X and Y?

Which circuit could be used to find the resistance of the resistor R?