JEE & NEETJEE Physics JEE Main Physics 100+ MCQ & Answer | Page-07 | JEE & NEET MCQ February 4, 2025 DSN MARATHI 61. Cyclotron can be used in _______. A. Particle therapy to treat cancer B. source of high energy beam for a nuclear physics experiment C. Produced short-lived positron -emitting isotopes for PET imaging D. All of the above Answer Option : D 62. A Cyclotron can accelerate _______. A. β particles B. α particles C. High -velocity gamma rays D. High-velocity X-rays Answer Option : A 63. Cyclotron cannot accelerate _______. A. Electrons B. Neutrons C. Positive ions D. Both (1) and (2) Answer Option : D 64. 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 65. The dielectric constant cannot be _____. A. Infinity B. 5 C. 6 D. 7 Answer Option : A 66. Dielectric material are basically ________. A. Insulator B. Semiconductors C. superconductors D. Conductors Answer Option : A 67. Which among the following is a dielectric? A. Copper B. Aluminium C. Plastic D. Ceramic Answer Option : D 68. 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 69. How can a dielectric be converted to a conductor? A. Compression B. Heating C. Expanding D. Freezing Answer Option : B 70. Dielectric material do not have _______. A. Free electrons B. Bound charge C. Proton D. neutron Answer Option : A
61. Cyclotron can be used in _______. A. Particle therapy to treat cancer B. source of high energy beam for a nuclear physics experiment C. Produced short-lived positron -emitting isotopes for PET imaging D. All of the above Answer Option : D
62. A Cyclotron can accelerate _______. A. β particles B. α particles C. High -velocity gamma rays D. High-velocity X-rays Answer Option : A
63. Cyclotron cannot accelerate _______. A. Electrons B. Neutrons C. Positive ions D. Both (1) and (2) Answer Option : D
64. 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
66. Dielectric material are basically ________. A. Insulator B. Semiconductors C. superconductors D. Conductors Answer Option : A
67. Which among the following is a dielectric? A. Copper B. Aluminium C. Plastic D. Ceramic Answer Option : D
68. 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
69. How can a dielectric be converted to a conductor? A. Compression B. Heating C. Expanding D. Freezing Answer Option : B
70. Dielectric material do not have _______. A. Free electrons B. Bound charge C. Proton D. neutron Answer Option : A
