JEE · NEET Previous Year Question
When you walk through a metal detector carrying a metal object in your pocket, it raises an alarm. This phenomenon works on
Topic: JEE PYQ
Answer: B. Full step-by-step solution below.
- AElectromagnetic induction
- BResonance in ac circuits
- CMutual induction in ac circuits
- Dinterference of electromagnetic waves
Correct answer: B
Solution
(b) Metal detector works on the principle of transmitting an electromagnetic signal and analyses a return signal from the target. So it works on the principle of resonance in AC circuit.More Alternating Current PYQs
- An alternating current is represented by the equation, ampere. The…
- A series LCR circuit is connected to an ac source of voltage volt. If the resi…
- An ideal transformer with purely resistive load operates at 12 kV on the primary side. It supplies electrical energy to a number o…
- If wattless current flows in the AC circuit, then the circuit is
- The frequency of ac at which capacitor and inductor will have same reactance…