A. X-rays
B. α-rays
C. β-rays
D. γ-rays
Related Mcqs:
- A cup of milk is placed in a microwave oven. Tell which statements is false. (1) Milk will be heated up only. (2) Cup will remain cool. (3) Both cup and mild will get hot ?
A. None
B. 1
C. 2
D. 3 - Two sources of light are coherent if they emit rays of_______________?
A. same wavelength
B. same amplitude of vibration
C. same wave length with constant phase difference
D. same amplitude and wavelength - Hydrogen atom does not emit X-rays because _________________?
A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electron - Nuclear forces exist between ___________________?
A. Proton-proton
B. Proton-neutron
C. Neutron-neutron
D. All of the above - Mass defect per nucleon is ___________________?
A. The binding energy of the nucleus
B. Packing fraction
C. The average energy of the nucleus
D. All of above are one and the same thing - In vibrating cord the points where the amplitude is maximum, are called ___________________?
A. antinodes
B. nodes
C. troughs
D. crests - Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?
A. Dopplers effect
B. Interference of waves
C. Beats phenomena
D. All of these - Sound waves do not travel in vacuum because ___________________?
A. they are transverse waves
B. they are stationary waves
C. they require material medium for propagation
D. they do not have enough energy - In the following figure, the terminal potential is ___________________ ?
A. zero
B. 2V
C. 12V
D. 36V - Gives the definition of metre in terms of wavelength of red cadmium light ___________________?
A. Newton
B. Einstein
C. Michelson
D. Galileo
