NEET UG Physics — Electromagnetism previous year questions with solutions.
The magnitude and direction of the current in the following circuit is 
A copper wire of radius $1 \mathrm{~mm}$ contains $10^{22}$ free electrons per cubic metre. The drift velocity for free electrons when $10 \mathrm{~A}$ current flows through the wire will be (Given, charge on electron $=1.6 \times 10^{-19} \mathrm{C}$ )
The variation of susceptibility $(\chi)$ with absolute temperature $(T)$ for a paramagnetic material is represented as:
An ac source is connected to a capacitor $C$. Due to decrease in its operating frequency:
The equivalent capacitance of the arrangement shown in figure is 
A certain wire $A$ has resistance $81 \Omega$. The resistance of another wire $B$ of same material and equal length but of diameter thrice the diameter of $A$ will be
The maximum power is dissipated for an ac in a/an
An ac source is connected in the given circuit. The value of $\phi$ will be 
A charge $Q \mu C$ is placed at the centre of a cube. The flux coming out from any one of its faces will be (in SI unit)
If the galvanometer $G$ does not show any deflection in the circuit shown, the value of $R$ is given by: 
According to Gauss law of electrostatics, electric flux through a closed surface depends on
The equivalent capacitance of the system shown in the following circuit is: 
The emf of a cell having internal resistance $1 \Omega$ is balanced against a length of $330 \mathrm{~cm}$ on a potentiometer wire. When an external resistance of $2 \Omega$ is connected across the cell, the balancing length will be
In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of $2.0\times {10}^{10}\mathrm{Hz}$ and amplitude $48V{m}^{-1}$. Then the amplitude of oscillating magnetic field is: (Speed of light in free space =$3\times {10}^{8}m{s}^{-1}$)
A long straight wire of length $2 \mathrm{~m}$ and mass $250 \mathrm{~g}$ is suspended horizontally in a uniform horizontal magnetic field of $0.7 \mathrm{~T}$. The amount of current flowing through the wire will be $\left(g=9.8 \mathrm{~ms}^{-2}\right)$
The magnetic energy stored in an inductor of inductance $4\mu H$ carrying a current of $2A$ is:
As the temperature increases, the electrical resistance
A standard filament lamp consumes $100 \mathrm{~W}$ when connected to $200 \mathrm{~V}$ a.c. mains supply. The peak current through the bulb will be :
The distance between the two plates of a parallel plate capacitor is doubled and the area of each plate is halved. If $\mathrm{C}$ is its initial capacitance, its final capacitance is equal to:
When light propagates through a material medium of relative permittivity ${\epsilon }_{r}$ and relative permeability ${\mu }_{r}$, the velocity of light, $v$ is given by : ($c$ - velocity of light in vacuum)
Two resistors of resistance, $100\Omega$ and $200\Omega$ are connected in parallel in an electrical circuit. The ratio of the thermal energy developed in $100\Omega$ to that in $200\Omega$ in a given time is
A Wheatstone bridge is used to determine the value of unknown resistance $X$ by adjusting the variable resistance $Y$ as shown in the figure. For the most precise measurement of $X$, the resistances $P$ and $Q$ 
The unit of electric potential is
The equivalent resistance of the infinite network given below is: 