List of top Physics Questions on Current electricity asked in JEE Main

The reading of the ammeter for a silicon diode in the given circuit is

Two batteries with e.m.f. $12\, V$ and $13\, V$ are connected in parallel across a load resistor of $10 \, \Omega$. The internal resistances of the two batteries are $1 \, \Omega$ and $2 \, \Omega$ respectively. The voltage across the load lies between :

A uniform wire of length $l$ and radius $r$ has a resistance of $100 \, \Omega$ . It is recast into a wire of radius $\frac{r}{2}$. The resistance of new wire will be :

In the above circuit the current in each resistance is

When $5\,V$ potential difference is applied across a wire of length $0.1\,m$, the drift speed of electrons is $2.5\times10^{-4}$ $ms^{-1}$. If the electron density in the wire is $8\times10^{28}\, m^{-3}$ the resistivity of the material is close to

In the electric network shown, when no current flows through the $4\, \Omega$ resistor in the arm $EB$, the potential difference between the points $A$ and $D$ will be :

The circuit shown here has two batteries of $8.0\, V$ and $16.0\, V$ and three resistors $3 \Omega , 9 \Omega$ and $9 \Omega$ and a capacitor $5.0 \mu F$.

How much is the current $I$ in the circuit in steady state ?

A d.c. main supply of e.m.f. $220\, V$ is connected across a storage battery of e.m.f. $200\, V$ through a resistance of $1$ $\Omega$. The battery terminals are connected to an external resistance '$R$'. The minimum value of '$R$', so that a current passes through the battery to charge it is :

In a large building, there are 15 bulbs of 40\, W, 5 bulbs of 100 W, 5 fans of $80\, W$ and 1 heater of $1\, kW$. The voltage of the electric mains is $220 \,V$. The minimum capacity of the main fuse of the building will be :

In the circuit shown, current (in A) through the 50 V and 30 V batteries are, respectively :

Correct set up to verify Ohm?s law is :

In a metre bridge experiment null point is obtained at $40\, cm$ from one end of the wire when resistance $X$ is balanced against another resistance $Y$. If $X < Y$, then the new position of the null point from the same end, if one decides to balance a resistance of $3X$ against $Y$, will be close to: