EMI and AC NEET PYQs (1991–2026)

Solved EMI and AC PYQs

3 recent questions with answers. The full set of 118 is free to practise.

1. NEET 2026EasyLCR Series Circuit
   Q1

   An ac voltage $V=220\sin \left(2\times 10^{3}t\right)$ Volt is applied to a series LCR circuit. Then the current amplitude in this circuit is: (Given: $L=10mH$, $C=25\mu F$, $R=100\Omega$)

   • A2.2A
   • B5.5A
   • C11.0A
   • D22.0A

   Show answer & solution

   Correct answer: (A)

   $\omega =2\times 10^3$ rad/s.
   
   $X_L=\omega L=2\times 10^3\times 10\times 10^{-3}=20\Omega$.
   
   $X_C=\frac{1}{\omega C}=\frac{1}{2\times 10^3\times 25\times 10^{-6}}=\frac{1}{0.05}=20\Omega$.
   
   $X_L=X_C$, so resonance. Impedance $Z=R=100\Omega$.
   
   $V_0=220$ V.
   
   $I_0=\frac{V_0}{Z}=\frac{220}{100}=2.2$ A.
2. NEET 2026EasySelf Inductance and Mutual Inductance
   Q2

   Consider a long solenoid of length $l$ and radius $r$. If $n$ is the number of turns per unit length and ${\mu }_0$ is the permeability of free space, the inductance of the solenoid is:

   • A${\mu }_0\pi n^2{r}^{2}l$
   • B${\mu }_0{\pi }^2{r}^{2}l$
   • C$\frac{{\mu }_0}{2\pi }{n}^2{r}^{2}l$
   • D$2{\mu }_0\pi n^2{r}^{2}l$

   Show answer & solution

   Correct answer: (A)

   Inductance of solenoid
   
   $L={\mu }_0{n}^{2}Al={\mu }_0{n}^2\left(\pi r^2\right)l={\mu }_0\pi n^2{r}^{2}l$.
3. NEET 2026EasyResonance in LCR Circuit
   Q3

   An ac circuit contains a resistance of $1\text{k}\Omega$, a capacitor of $0.1\mu \text{F}$ and an inductor of $1\text{mH}$ connected in series. The resonance frequency of the circuit is approximately:

   • A13.5 kHz
   • B10.1 kHz
   • C20.7 kHz
   • D15.9 kHz

   Show answer & solution

   Correct answer: (D)

   $$f_0=\frac{1}{2\pi \sqrt{LC}}=\frac{1}{2\pi \sqrt{1\times 10^{-3}\times 0.1\times 10^{-6}}}$$
   
   $=\frac{1}{2\pi \sqrt{10^{-10}}}=\frac{1}{2\pi \times 10^{-5}}=\frac{10^5}{2\pi }\approx 15915$Hz $\approx 15.9$ kHz.

Topic-wise question count

Where NEET has asked from EMI and AC, most frequent first.

• Self Inductance and Mutual Inductance20
• LCR Series Circuit – Impedance, Phase and Power Factor19
• Faraday’s Laws of Electromagnetic Induction13
• AC Circuit with Pure Resistance, Inductance and Capacitance12
• Transformers11
• Motional EMF11
• Resonance in LCR Circuit10
• AC Voltage and Current basics9
• LC Oscillations3
• Energy Stored in an Inductor3
• Eddy Currents and their Applications3
• Lenz’s Law2
• LCR Series Circuit1
• AC Circuit (R, L, C)1

Year-wise EMI and AC questions in NEET

Number of questions from this chapter in each year's paper(s).