A. Ultraviolet rays
B. Infrared rays
C. Cosmic rays
D. X-rays
Related Mcqs:
- When the wavelength of incident X-rays increases, the angle of diffraction__________________?
A. Decreases
B. Increases
C. Remain constant
D. Shows no systematic variation - Wavelength of radiation emitted by a body depends on the ________________ of its surface?
A. Temperature
B. Area
C. Nature
D. All ‘A’, ‘B’ & ‘C’ - Particle nature of cathode rays is proved due to the fact that they ________________?
A. Travel in a straight line
B. Get deflected by magnetic electric field
C. Produce fluorescence
D. Heat the exposed material - Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________?
A. Paper
B. Cloth
C. Lead
D. Aluminium - X-rays are__________________?
A. Positively charged
B. Negatively charged
C. Neutral
D. Of higher wavelength than visible light - Which of the following materials has the least scrap value ?
A. Aluminium
B. Stainless steel
C. Brass
D. Copper - Which of the following has the least value of ultimate tensile strength (UTS) ?
A. Medium carbon steel
B. High carbon steel
C. Cast iron
D. Wrought iron - A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?
A. Steel
B. Glass
C. Rubber
D. Brass - Out of the following, the ________________ pipe has the least corrosion resistance?
A. Mild steel
B. Copper
C. Cast iron
D. Wrought iron - In case of compression of one kg of air, the work done will be the least, when the value of polytropic index ‘n’ is______________________?
A. 1
B. 1.4
C. 1.5
D. Y = Cp/Cv
