Class XI CBSE – Revision Questions MCQ – Semester 1

What is the gravitational field strength of a planet when the weight of a 100 kg astronaut is 400 N? a)      ¼ N kg-1   b) 9.8 N kg-1 c) 4 N kg-1  d) infinity   The only natural satellite of the earth complete orbits in about a)      24 days b) 27.3 days c) 30 days … Continue reading Class XI CBSE – Revision Questions MCQ – Semester 1

Class XII Physics SOME QUESTIONS FROM CBSE 2004 Board Question Paper

Physics 2004 Set 1 Why is shortwave band used for long distance radio broadcast? Two metals A and B have work functions 2 eV and 5 eV respectively. Which metal has lower threshold wavelength? Draw the voltage-current characteristic of a zener diode. A solenoid with an iron core and a bulb is connected to a … Continue reading Class XII Physics SOME QUESTIONS FROM CBSE 2004 Board Question Paper

CBSE Class X Physics SA 1 Questions and Answers

  Suggest two reasons which make the large scale usage of nuclear energy prohibitive. Why are solar cookers  covered by a glass plate? What is the colour of insulation over the earth wire? Why is an earth wire connected to metallic part of appliances? What are the factors on which the resistance of a conductor  … Continue reading CBSE Class X Physics SA 1 Questions and Answers