Embibe Experts Solutions for Chapter: Electromagnetic Induction and Alternating Currents, Exercise 3: Level 3

The figure represents an area $A=0.5 {\mathrm{m}}^2$ situated in a uniform magnetic field $B=2.0 \mathrm{weber} {\mathrm{m}}^{-2}$ and making an angle of $60°$ with respect to the magnetic field. The value of the magnetic flux through the area would be equal to

Which of the following remain constant in a transformer ?

A sinusoidal voltage with a frequency of $50 \mathrm{Hz}$ is applied to a series $LCR$ circuit with a resistance of $5 \mathrm{\Omega }$, inductance of $20 \mathrm{mH}$ and a capacitance of $500 \mu \mathrm{F}$. The magnitude of impedance of the circuit is close to

Three identical emf sources are attached to a single circuit element: a resistor, a capacitor, or an inductor. The current amplitude is then measured as a function of frequency. Which one of the following curve corresponds to inductive circuit?

The figure shows an LCR network connected to a $300 \mathrm{V}$ $AC$ supply. The circuit elements are such that $R=X_L=$ $X_C=10\mathrm{\Omega }.$ Three voltmeters $V_1, V_2$ and $V_3$ are connected as shown. Which of the following represents the correct set of readings of the voltmeters?

A metallic square loop $\mathrm{ABCD}$ is moving in its own plane with velocity $v$ in a uniform magnetic field perpendicular to its plane as shown in the figure. An electric field is induced

Figure shows three regions of magnetic field each of area $A$ and in each region magnitude of magnetic field decreases at a constant rate $\alpha$. If $\overrightarrow{E}$ is induced electric field, then value of line integral $\oint \overrightarrow{E}·\mathrm{d}\overrightarrow{r}$ along the given loop is equal to,

In a $L$–$R$ growth circuit, inductance and resistance used are $1 \mathrm{H}$ and $20 \mathrm{\Omega }$, respectively. If at $t=50 \mathrm{ms}$, current in the circuit is $3.165 \mathrm{A}$, then applied direct current $\mathrm{e}.\mathrm{m}.\mathrm{f}.$ is,