Q.1:- Which are the primary Colours ?
Ans:- Red, Green, Blue
Q.2:- Which unit we use to express Nuclear sizes ?
Ans:- Fermi
Q.3:- Give the name of the instrument that is used to measure altitudes in aircraft’s ?
Ans:- Altimeter
Q.4:- Which instrument is used in submarine to see the objects above sea level ?
Ans:- Periscope
Q.5:- Thomas Alva Edison invented ?
Ans:- Cinematograph
Q.6:- Give one invention of Harry Brearley ?
Ans:- Stainless Steel
Q.7:- Radian per second is unit of ?
Ans:- Angle Velocity
Q.8:- Give the name of the unit of Work and Energy ?
Ans:- Joule
Q.9:- What is unit of Electrical Capacity ?
Ans:- Farad
Q.10:- Energy posses by a body in motion is called ?
Ans:- Kinetic Energy
Q.11:- Solar cell converts ?
Ans:- It converts solar energy into electrical energy
Q.12:- Longitudinal Waves and Transverse waves are types of ?
Ans:- Mechanical Waves
Q.13:- Give the relation between wavelength, frequency and velocity ?
Ans:- Velocity of wave = Frequency x Wavelength
Q.14:- What is Refractive Index ?
Ans:- Refractive Index is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
Q.15:- Device used to measure potential difference between two points in a circuit is called ?
Ans:- Voltmeter
Q.16:- Which instrument is used to determine the intensity of colours ?
Ans:- Colorimeter
Q.17:- Name of the instrument that is used to measure sound under water ?
Ans:- Hydrophone
Q.18:- Which instrument is used to measure pressure of gases ?
Ans:- Manometer
Q.19:- K. Macmillan invented ?
Ans:- Bicycle
Q.20:- Who discovered Atom ?
Ans:- John Dalton
Q.21:- The absorption of ink by blotting paper involves ?
Ans:- Capillary Action Phenomenon
Q.22:- Nuclear sizes are expressed in a unit named ?
Ans:- Fermi
Q.23:- Atmospheric pressure is measured by ?
Ans:- Barometer
Q.24:- Force of attraction between the molecules of different substances is called ?
Ans:- Adhesive Force
Q.25:- Give the name of the nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called ?
Ans:- Nuclear Fission
