Electromagnetic Induction and Alternating Currents NEET PYQ Analysis

Electromagnetic Induction and Alternating Currents NEET PYQ Analysis

The table below shows the number of questions asked from the electromagnetic induction and alternating current chapter in the NEET exam (2020-2025). This analysis will help aspirants understand the trend and prioritise their preparation.

Advantages of Solving Electromagnetic Induction and Alternating Currents NEET PYQ

Many students often struggle with this chapter because of the calculation part. Accessing the PYQs makes concepts easier and builds confidence. According to the NEET Physics chapter-wise weightage, this chapter carries good weightage. Following the right NEET preparation tips makes the preparation effective. Given below are some benefits of solving NEET PYQ from Electromagnetic Induction and Alternating Currents.

• Practising Electromagnetic Induction and Alternating Currents NEET PYQ helps students understand the question pattern.

• This chapter is among the do-or-die chapters for NEET.

• Solving previous year questions builds speed and accuracy.

• Attempting NEET PYQs helps in reducing common mistakes.

Electromagnetic Induction and Electric Currents NEET PYQ

Understanding this chapter needs both theory and practice. Attempting the NEET question papers gives a clear idea of the question pattern. Given below are some Electromagnetic Induction and Alternating Currents NEET PYQ. Students can allot time to solve these questions in their NEET preparation timetable. This approach reduces the chances of negative marking during the NEET exam.

Question 1: To an AC power supply of 220 V at 50 Hz, a resistor of $20 \Omega$, a capacitor of reactance $25 \Omega$, and an inductor of reactance $45 \Omega$ are connected in series. The corresponding current in the circuit and the phase angle between the current and the voltage are, respectively. (NEET 2025)

Options

1. $15.6 A$ and $45{ }^{\circ}$

2. $7.8 A$ and $30^{\circ}$

3. $7.8 A $ and $45^{\circ}$

4. $15.6 A$ and $30^{\circ}$

Answer:

Given:
Voltage $V=220 \mathrm{~V}$
Resistance $R=20 \Omega$
Capacitive reactance $X_C=25 \Omega$
Inductive reactance $X_L=45 \Omega$

Net reactance: $X=X_L-X_C=45-25=20 \Omega$
Impedance: $Z=\sqrt{R^2+X^2}=\sqrt{20^2+20^2}=\sqrt{800}=20 \sqrt{2} \Omega$

Current:
$I=\frac{V}{Z}=\frac{220}{20 \sqrt{2}}=\frac{11}{\sqrt{2}} \approx 7.8 \mathrm{~A}$

Phase angle:
$\tan \phi=\frac{X}{R}=\frac{20}{20}=1 \implies \phi=45^{\circ}$

Hence, the correct answer is option (3), $7.8 A $ and $45^{\circ}$.

Question 2: In a series LCR circuit, the inductance $L = 10 \,\text{mH}$, capacitance $C = 1 \,\mu\text{F}$, and resistance $R = 100 \,\Omega$. The frequency at which resonance occurs is? (NEET 2023)

Options

1. 15.9 rad/s

2. 15.9 kHz

3. 1.59 rad/s

4. 1.59 kHz

Answer:

Resonant frequency:

$f_R = \frac{1}{2 \pi \sqrt{LC}}$

$= \frac{1}{2 \pi \sqrt{10 \times 10^{-3} \times 10^{-6}}}$

$= \frac{10^4}{2 \pi} \approx 1.59 \times 10^3 \ \text{Hz} = 1.59 \ \text{kHz}$

Hence, the correct answer is option (4), 1.59 kHz.

Question 3: A 12 V, 60 W lamp is connected to the secondary of a step-down transformer, whose primary is connected to the AC mains of 220 V. Assuming the transformer to be ideal, what is the current in the primary winding? (NEET 2023)

Options

1. 0.27A

2. 2.7A

3. 3.7A

4. 0.37A

Answer:

For an ideal transformer,

$P_{in} = P_{out}$

$\Rightarrow V_{in} I_{in} = V_{out} I_{out}$

$\Rightarrow 220 \times I_{in} = 60 \quad \Rightarrow I_{in} = 0.27 \,\text{A}$

Hence, the correct answer is option (1) $0.27 \,\text{A}$.

Question 4: The peak voltage of the AC source is equal to: (NEET 2022)

Options

1. The RMS value of the AC source

2. $\sqrt{2}$ times the rms value of the ac source

3. $\frac{1}{\sqrt{2}}$ times the rms value of the ac source

4. The value of the voltage supplied to the circuit

Answer:

$\dfrac{\text{Peak Voltage}}{\sqrt{2}} = \text{RMS Voltage}$

$\therefore \ \text{Peak Voltage} = \sqrt{2} \, (\text{RMS Voltage})$

Hence, the correct answer is option (2), $\sqrt{2}$ times the rms value of the ac source.

Question 5: A Step-Down Transformer connected to an AC mains supply of 220V is made to operate at 11V, 44W lamp. Ignoring power losses in the Transformer, what is the current in the primary circuit? (NEET 2021)

Options

1. 0.2A

2. 0.4A

3. 2A

4. 4A

Answer:

Since power loss is ignored,

$\eta = 1 = \dfrac{(\text{power})_{output}}{(\text{power})_{input}}$

$P_{input} = P_{output}$

$V_p I_p = V_s I_s$

$I_p = \dfrac{44}{220} = \dfrac{1}{5} = 0.2 \,\text{A}$

Hence, the correct answer is option (1) $0.2 \,\text{A}$.

Scoring Topics of Electromagnetic Induction and Alternating Currents

Studying this chapter becomes easier when students focus on the important topics first. To make concepts clear, aspirants can refer to the NCERT books for NEET. Provided below is a table that includes the main topics. Questions from these topics are asked in the NEET Electromagnetic Induction and Alternating Currents previous year questions.

How Many Questions Come from Electromagnetic Induction in NEET?

Every year, 2-3 questions are asked by the NTA from this chapter. Sometimes it may go up to 4, depending on the paper. Mainly, conceptually based and numerically based questions appear. As per the weightage, it covers around 7-8% of the Physics section. Regular revision of this chapter makes the concepts easier to recall. Practicing numerical-based problems improves speed during the exam.

Is Electromagnetic Induction a Tough Chapter?

Many students find this chapter tough at first. The biggest confusion comes in understanding Lenz’s law and sign conventions. Some aspirants also struggle with the direction of the induced current. But once the basics are clear, the questions become easier. Overall, it is not a very difficult chapter if the base is strong. With consistent practice, students can master the electromagnetic induction chapter.