List of top Physics Questions on Inductance asked in MHT CET

A coil is wound on a core of rectangular cross section. If all the linear dimensions of core are increased by a factor 3 and number of turns per unit length of coil remains same, the self inductance increases by a factor
A coil of wire of radius 'r' has 600 turns and a self-inductance of 108 mH. The self-inductance of a coil with same radius and 500 turns is ______.
Two circuits A and B are connected to identical d.c. sources each of e.m.f. 10 volt. Self-inductances are $L_A = 10$ H and $L_B = 10$ mH. The total resistance of each circuit is 40 $\Omega$. The ratio of energy consumed in circuit A and circuit B to build up the current to steady value is ______.
If $L$ is the inductance and $R$ is the resistance then the SI unit of $\frac{L}{R}$ is
Two planar concentric rings of metal wire having radii $\text{r}_1$ and $\text{r}_2$ ( $\text{r}_1 > \text{r}_2$ ) are placed in air. The current $\text{I}$ is flowing through the coil of larger radius. The mutual inductance between the coils is given by ( $\mu_0 =$ permeability of free space)}
A coil of self-inductance $L$ is connected in series with a bulb and an a. c. source. Brightness of the bulb decreases when
If $L$ is the inductance and $R$ is the resistance then the SI unit of $\frac{L}{R}$ is
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon:
An e.m.f of 5 volts is produced by a self-inductance when the current changes at a steady rate from 3A to 2A in 1 millisecond. The value of self-inductance is:
If \( L \) is the inductance and \( R \) is the resistance, then the unit of \( \frac{L}{R} \) is:
In a coil, the current changes from \( -2 \, \text{A} \) to \( +2 \, \text{A} \) in \( 0.2 \, \text{s} \) and induces an emf of \( 0.1 \, \text{V} \). The self-inductance of the coil is:
A circuit has self-inductance 'L' H and carries a current 'I' A. To prevent sparking when the circuit is switched off, a capacitor which can withstand 'V' volt is used. The least capacitance of the capacitor connected across the switch must be equal to
The self inductance of a solenoid of length $31.4 \text{ cm}$, area of cross section $10^{-3} \text{ m}^2$ having total number of turns $500$ will be nearly [$\mu_0 = 4\pi \times 10^{-7}$ SI unit]
If the current of $I\text{ A}$ gives rise to a magnetic flux $\phi$ through a coil having $N$ turns, then magnetic energy stored in the medium surrounding the coil is
In the part of an a.c. circuit as shown, the resistance $R = 0.2\ \Omega$. At a certain instant $(V_A - V_B) = 0.5\text{ V}$, $I = 0.5\text{ A}$ and $\frac{\Delta I}{\Delta t} = 8\text{ A/s}$. The inductance of the coil is
A coil of radius 'r' is placed on another coil (whose radius is 'R' and current through it is changing) so that their centres coincide. (\( R > r \)). If both coplanar, then the mutual inductance between them is proportional to
The magnetic potential energy stored in a certain inductor is $25\ \text{mJ}$, when the current in the inductor is $50\ \text{mA}$. This inductor is of inductance
Three pure inductors each of inductance $6\text{ H}$ are connected as shown in the figure. Their equivalent inductance between the points 'P' and 'Q' is

Choose the correct answer from the options given below
A coil of radius 'r' is placed on another coil (whose radius is 'R' and current through it is changing) so that their centres coincide. (\( R > r \)). If both coplanar, then the mutual inductance between them is proportional to
The magnetic potential energy stored in a certain inductor is $25\ \text{mJ}$, when the current in the inductor is $50\ \text{mA}$. This inductor is of inductance