NEET Electromagnetic Induction and AC questions
12 Physics questions on Electromagnetic Induction and AC as asked in NEET, newest first.
- To an ac power supply of 220 V at 50 Hz, a resistor of 20 Ω, a capacitor of reactance 25 Ω and an inductor of reactance 45 Ω are connected in series. The corresponding current in the circuit and the phase angle between…
2025
- In an ideal transformer, the turns ratio is N_p/N_s = 1/2. The ratio V_s : V_p is equal to (the symbols carry their usual meaning):
2024
- A 12 V, 60 W lamp is connected to the secondary of a step-down transformer, whose primary is connected to ac mains of 220 V. Assuming the transformer to be ideal, what is the current in the primary winding?
2023
- The magnetic energy stored in an inductor of inductance 4 muH carrying a current of 2 A is
2023
- An ac source is connected to a capacitor C. Due to decrease in its operating frequency
2023
- In a series LCR circuit, the inductance L is 10 mH, capacitance C is 1 muF and resistance R is 100 Ω. The frequency at which resonance occurs is
2023
- The peak voltage of the ac source is equal to
2022
- A square loop of side 1 m and resistance 1 Ω is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is
2022
- A series LCR circuit with inductance 10 H, capacitance 10 muF, resistance 50 Ω is connected to an ac source of voltage, V = 200sin(100t) volt. If the resonant frequency of the LCR circuit is nu_0 and the frequency of…
2022
- A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rad s^-1. If the vertical component of earth's magnetic field at that place is 2 × 10^-5 T and electrical…
2022
- A 40 muF capacitor is connected to a 200 V, 50 Hz ac supply. The rms value of the current in the circuit is, nearly :
2020
- A series LCR circuit is connected to an ac voltage source. When L is removed from the circuit, the phase difference between current and voltage is (π)/3. If instead C is removed from the circuit, the phase difference is…
2020
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