Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following series spectrum of hydrogen atom lies in ultraviolet region?

A
Paschen series
B
Brackett series
C
Pfund series
D
Lyman series
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The wavelength of the second line of Balmer series is 486.4 nm. What is the wavelength of the first line of Lyman series?

A
78.8 nm
B
121.6 nm
C
418.2 nm
D
610.5 nm
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The Lyman series of a hydrogen atom belongs in which category

A
ultraviolet region
B
infrared region
C
visible region
D
None of these
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

If an electron in hydrogen atom jumps from an orbit of level $$n=3$$ to an orbit at level $$n=2$$, emitted radiation has a frequency of

(R = Rydberg's constant and c = velocity of light)

A
$$\frac{3Rc}{27}$$
B
$$\frac{Rc}{25}$$
C
$$\frac{8Rc}{9}$$
D
$$\frac{5Rc}{36}$$
COMEDK Subjects