A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
A beam of cathode rays is subjected to crossed Electric(E) and Magnetic fields(B). The fields are adjusted such that the…
8 years ago
Physics
A 5 watt source emits monochromatic light of wavelength 5000Å. When placed
A 5 watt source emits monochromatic light of wavelength 5000Å. When placed 0.5 m away, it liberates photoelectrons from a…
8 years ago
A source of light is placed at a distance of 50 cm from a photocell and the stopping
A source of light is placed at a distance of 50 cm from a photocell and the stopping potential is…
8 years ago
A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm. Assuming it to be 25% efficient in…
8 years ago
What is the energy of photon whose wavelength is 6840 Å?
What is the energy of photon whose wavelength is 6840 Å? Options (a) (1.81 eV) (b) (3.6 eV) (c) (-13.6…
8 years ago
The ionization energy of Li⁺⁺ is equal to
The ionization energy of Li⁺⁺ is equal to Options (a) 9hcR (b) 6hcR (c) 2hcR (d) hcR Correct Answer: 9hcR…
8 years ago
The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV, and the stopping potential for a…
8 years ago
If alpha, beta and gamma rays carry same momentum, which has the longest
If alpha, beta and gamma rays carry same momentum, which has the longest wavelength Options (a) Alpha rays (b) Beta…
8 years ago
Photoelectric current from a given photocell will depend upon
Photoelectric current from a given photocell will depend upon Options (a) Number of photons striking per second (b) Frequency of…
8 years ago
If by mistake voltmeter is connected in series and ammeter in parallel then
If by mistake voltmeter is connected in series and ammeter in parallel then Options (a) both are damaged (b) ammeter…
8 years ago