JEE & NEETNEET Physics NEET Physics MCQ & Answer | page-06 February 4, 2025 DSN MARATHI 51. Which of the following statements is true for a dielectric? A. Dielectrics are superconductors at high temperature B. Dielectrics are superconductors at low temperature C. The cannot become superconductors D. They have very less breakdown voltage Answer Option : B 52. The dielectric constant cannot be _____. A. Infinity B. 5 C. 6 D. 7 Answer Option : A 53. Dielectric material are basically ________ A. Insulator B. Semiconductors C. superconductors D. Conductors Answer Option : A 54. Which among the following is a dielectric? A. Copper B. Aluminium C. Plastic D. Ceramic Answer Option : D 55. When the air in a capacitor is replaced by a medium of dielectric constant K, the capacity ____. A. Decrease K times B. Increase K times C. The K2 times D. Remains constant Answer Option : B 56. How can a dielectric be converted to a conductor? A. Compression B. Heating C. Expanding D. Freezing Answer Option : B 57. Dielectric material do not have _______. A. Free electrons B. Bound charge C. Proton D. neutron Answer Option : A 58. Find the dielectric constant for material with electric susceptibility of 5. A. 4 B. 6 C. 7 D. 3 Answer Option : B 59. The cyclotron frequency of an electron grating in a magnetic field of 1 T is approximately _____. A. 28MHz B. 280MHz C. 2.8 GHz D. 28GHz Answer Option : D 60. The angular frequency of a cyclotron is independent of _______. A. Speed B. Mass C. Magnetic field D. Charge Answer Option : A
51. Which of the following statements is true for a dielectric? A. Dielectrics are superconductors at high temperature B. Dielectrics are superconductors at low temperature C. The cannot become superconductors D. They have very less breakdown voltage Answer Option : B
53. Dielectric material are basically ________ A. Insulator B. Semiconductors C. superconductors D. Conductors Answer Option : A
54. Which among the following is a dielectric? A. Copper B. Aluminium C. Plastic D. Ceramic Answer Option : D
55. When the air in a capacitor is replaced by a medium of dielectric constant K, the capacity ____. A. Decrease K times B. Increase K times C. The K2 times D. Remains constant Answer Option : B
56. How can a dielectric be converted to a conductor? A. Compression B. Heating C. Expanding D. Freezing Answer Option : B
57. Dielectric material do not have _______. A. Free electrons B. Bound charge C. Proton D. neutron Answer Option : A
58. Find the dielectric constant for material with electric susceptibility of 5. A. 4 B. 6 C. 7 D. 3 Answer Option : B
59. The cyclotron frequency of an electron grating in a magnetic field of 1 T is approximately _____. A. 28MHz B. 280MHz C. 2.8 GHz D. 28GHz Answer Option : D
60. The angular frequency of a cyclotron is independent of _______. A. Speed B. Mass C. Magnetic field D. Charge Answer Option : A
