Electrical energy is measured in___________________?
A. watt B. horse power C. kilo watt D. kilowatt hour
Physics MCQs with Answers
Electrical energy is converted to heat at the rate of___________________?
A. IRt B. I2R C. I2Rt D. VIt
A fuse is placed in series with the circuit to protect against__________________?
A. high power B. high voltage C. high current D. over heating
Which one of the following bulbs has the least resistance ?
A. 100 watt B. 200 watt C. 300 watt D. 60 watt
Optical active crystals rotates the __________________?
A. vibrating plane B. polarization plane C. diffraction plane D. interference plane
In double slit experiment we observe _____________________?
A. interference fringes only B. diffraction fringes only C. both interference and diffraction fringes D. polirized frringes
Which one of the following properties of light does not change with the nature of the medium ?
A. velocity B. wavelength C. amplitude D. frequency
Photoelectric effect was given by ____________________?
A. Hertz B. Fresnel C. Einstein D. Plank
Longitudinal waves do not exhibit _____________________?
A. reflection B. refraction C. diffraction D. polarization
A point source of light placed in a homogeneous medium gives rise to ___________________?
A. a cylindrical wave front B. an elliptical wave front C. a spherical wave front D. a plane wave front