Introduction: This set
covers the factors affecting resistance, resistivity of different materials,
and their applications in daily life. These MCQs help understand how length,
area, temperature, and material properties influence resistance as per NCERT
Class 10 Physics curriculum.
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📘 Science
PHYSICS | Electricity-C
📝 Questions: 50
⏱️ Timer: 20 min
Q1. Insulators like rubber and glass have resistivity of the order of:
Q2. Glass is an:
Q3. Filaments of electric bulbs are made of:
Q4. Resistance depends on the:
Q5. Metals and alloys have resistivity of the order of:
Q6. Alloys are preferred in heating devices because they:
Q7. For same material and voltage, thinner wire carries:
Q8. A component of same size offering higher resistance is a:
Q9. Resistance of a uniform conductor is proportional to:
Q10. When the length of wire is doubled, the ammeter reading becomes:
Q11. Resistivity is denoted by the symbol:
Q12. Resistance of a conductor opposes:
Q13. An insulator of the same size offers:
Q14. Electric irons and toasters use:
Q15. Electrical transmission lines commonly use:
Q16. Electrons in a conductor are restrained due to:
Q17. Resistance increases when:
Q18. Resistance of a conductor depends on:
Q19. Current flows more easily through:
Q20. Main reason for using alloys in heaters is their:
Q21. Which material has the highest resistivity listed?
Q22. SI unit of resistivity is:
Q23. If a wire of resistance 4 Ω is doubled, new resistance is:
Q24. Using a thicker wire of same length and material causes current to:
Q25. Current drawn by a 1200 Ω bulb from 220 V source is:
Q26. Resistivity values are independent of:
Q27. Components that offer an easy path to electric current have:
Q28. Copper is not used for heating elements because it:
Q29. Poor conductor among metals listed is:
Q30. Resistance and resistivity vary with:
Q31. Doubling a wire on itself makes its resistance:
Q32. Resistance is inversely proportional to:
Q33. Different components in the same circuit give different currents because they have:
Q34. Replacing nichrome wire with copper wire of same dimensions causes current to:
Q35. A heater draws 4 A at 60 V. At 120 V, current becomes:
Q36. A thicker wire has:
Q37. The formula R = ρl/A shows resistance depends on:
Q38. Resistance of a wire decreases when:
Q39. Resistivity of a wire calculated as 1.84 × 10⁻⁶ Ω m corresponds to:
Q40. Resistivity is a:
Q41. When the length of a conductor is doubled, its resistance:
Q42. Alloys generally have resistivity:
Q43. Nichrome has high resistivity, so it is used in:
Q44. Nichrome is an alloy of:
Q45. The ammeter used in experiments has a range of:
Q46. The symbol for ohm is:
Q47. Series combination is preferred when:
Q48. A series circuit provides:
Q49. In electrical gadgets, resistors are used in:
Q50. Resistors connected end to end are said to be connected in:
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