Atomic Spectra

A. Number of incident electron i.e. filament current
B. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated
C. The soft target which can easily emit electrons
D. All of above are correct

A. 6.2 x 10-10m
B. 9.1 x 10-18m
C. 3.11 x 10-10m
D. 4 x 10-10m

A. The illumination of the target metal by ultra-violet radiation
B. The bombardment of the target by protons
C. The bombardment of target by electrons
D. The absorption of radiation by the target metal

A. Reducing the pressure or cooling the target
B. Increasing the temperature of the filament.
C. Using a target element of higher atomic number
D. Increasing the potential difference between the cathode and the target

A. B-rays
B. X-rays
C. Far infrared
D. Infrared

A. he/ev
B. he/Vc
C. eV/h
D. impossible to predict

A. A & B
B. B & C
C. A & C
D. A B & C

A. increases
B. it decreases
C. it remains same
D. sometimes increases and sometimes decreases

A. Cathode rays
B. Positive rays
C. γ-rays
D. Beta rays

A. γ-rays
B. Infra red radiation
C. Visible light
D. Ultraviolet rays