UPSC CAPF (AC) 2024 Paper I · Question 10
Question 10 of the UPSC CAPF (AC) 2024 Paper I (4 August 2024). Try it first, then open the answer and explanation.
Which one among the following does NOT have any linkage with the phenomenon of electromagnetic induction?
- Electric transformer
- Induction cooker
- Galvanometer
- Electron microscope
निम्नलिखित में से किसका विद्युत-चुंबकीय प्रेरण की परिघटना के साथ कोई सहलग्नता (linkage) नहीं है?
- विद्युत परिणामित्र (ट्रांसफॉर्मर)
- इंडक्शन कुकर
- धारामापी (गैल्वनोमीटर)
- इलेक्ट्रॉन सूक्ष्मदर्शी (माइक्रोस्कोप)
Show answer
Answer: (4) Electron microscope
उत्तर: (4) इलेक्ट्रॉन सूक्ष्मदर्शी (माइक्रोस्कोप)
A transformer works on mutual induction, an induction cooker heats the pan through eddy currents induced by a rapidly alternating magnetic field, and the galvanometer is the instrument used to detect induced currents (Faraday's experiments) and uses eddy-current damping. An electron microscope only uses electric and magnetic fields as lenses to deflect and focus a beam of electrons, which does not involve electromagnetic induction.