[{"id":151130,"question":"X-rays produced in a tube operating at 10<sup>5</sup>V. The speed of X-rays produced is","choices":[{"text":"3 x 10<sup>8</sup>m/s","value":"A"},{"text":"3.1 x 10<sup>8</sup>m/s","value":"B"},{"text":"2.8 x 10<sup>8</sup>m/s","value":"C"},{"text":"1.88 x 10<sup>8</sup>m/s","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151128,"question":"In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is","choices":[{"text":"Helium","value":"A"},{"text":"Neon","value":"B"},{"text":"Both","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151126,"question":"The value of the metastable state for Neon is","choices":[{"text":"20.66eV","value":"A"},{"text":"20.61eV","value":"B"},{"text":"19.23eV","value":"C"},{"text":"18.70eV","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151125,"question":"In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them","choices":[{"text":"Small","value":"A"},{"text":"Greater","value":"B"},{"text":"Equal","value":"C"},{"text":"Sometimes","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151123,"question":"X-ray are also known as","choices":[{"text":"Roentgen rays","value":"A"},{"text":"Maxwell rays","value":"B"},{"text":"Plank range","value":"C"},{"text":"Einstein rays","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151121,"question":"The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is","choices":[{"text":"1.24 x 10<sup>-10</sup>m","value":"A"},{"text":"7.92 x 10<sup>-20</sup>m","value":"B"},{"text":"2.78 x 10<sup>-14</sup>m","value":"C"},{"text":"3.88 x 10<sup>-11</sup>m","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151120,"question":"CT scanning is the abbreviated name of","choices":[{"text":"Computed Technology","value":"A"},{"text":"Computed Technique","value":"B"},{"text":"Computed Technology","value":"C"},{"text":"Computerized Technique","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151119,"question":"The first shell near the neucles is","choices":[{"text":"L-shell","value":"A"},{"text":"X-shell","value":"B"},{"text":"N-shell","value":"C"},{"text":"M-shell","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151117,"question":"The life time of metastable state is equal to","choices":[{"text":"Life time of excited state","value":"A"},{"text":"Greater than by excited state","value":"B"},{"text":"Zero","value":"C"},{"text":"Less than by excited state","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151116,"question":"We can excite an atom by","choices":[{"text":"Bombardment of particles","value":"A"},{"text":"Radiating photons","value":"B"},{"text":"Providing potential difference","value":"C"},{"text":"All answer are true","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":151113,"question":"Ultraviolet region lies in ______ series","choices":[{"text":"Layman","value":"A"},{"text":"Balmer","value":"B"},{"text":"P fund","value":"C"},{"text":"B racket","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":151111,"question":"Graph of Black body radiation is example of","choices":[{"text":"Band spectra","value":"A"},{"text":"Continuo's spectra","value":"B"},{"text":"Line spectra","value":"C"},{"text":"All","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":151110,"question":"Photons must have energy equal to","choices":[{"text":"ev","value":"A"},{"text":"En","value":"B"},{"text":"hf","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":151106,"question":"Gaussian surface is always:","choices":[{"text":"Rectangular","value":"A"},{"text":"Spherical","value":"B"},{"text":"Cylinder","value":"C"},{"text":"Box shape","value":"D"},{"text":"Any of these","value":"E"}],"correctAnswer":5},{"id":151103,"question":"Coulomb multiplied by volt by volt gives the unit called:","choices":[{"text":"farad","value":"A"},{"text":"Ohm","value":"B"},{"text":"Second","value":"C"},{"text":"joule","value":"D"},{"text":"Watt","value":"E"}],"correctAnswer":4},{"id":151097,"question":"Static electricity is produced by the transfer of:","choices":[{"text":"Electrons","value":"A"},{"text":"Protons","value":"B"},{"text":"One fluid","value":"C"},{"text":"Two fluid","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":1},{"id":151095,"question":"The electric field lines start from:","choices":[{"text":"Positive charge","value":"A"},{"text":"Negative charge","value":"B"},{"text":"Either A and B","value":"C"},{"text":"Neutron","value":"D"},{"text":"An atom","value":"E"}],"correctAnswer":1},{"id":151093,"question":"The photocopying process is called:","choices":[{"text":"Geography","value":"A"},{"text":"Sonography","value":"B"},{"text":"Xerography","value":"C"},{"text":"Zerography","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":151091,"question":"Selenium is:","choices":[{"text":"An insulator","value":"A"},{"text":"A conductor","value":"B"},{"text":"Both A and B","value":"C"},{"text":"Excellent conductor","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":3},{"id":151089,"question":"The inkjet printer eject a thin stream of:","choices":[{"text":"Water","value":"A"},{"text":"Oil","value":"B"},{"text":"Ink","value":"C"},{"text":"Any above","value":"D"},{"text":"None of these","value":"E"}],"correctAnswer":4},{"id":151087,"question":"If the distance between two charges is doubled,the force between them will become:","choices":[{"text":"Double","value":"A"},{"text":"Half","value":"B"},{"text":"One third","value":"C"},{"text":"One fourth","value":"D"},{"value":"E"}],"correctAnswer":4}]