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 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statement is true when a gamma decay occurs from the nucleus of an atom?

A
Mass number is reduced by 4 and atomic number remains the same
B
Mass number remains the same and atomic number increases by 1
C
Mass number and atomic number are not changed
D
Mass number is reduced by 4 and atomic number is reduced by 2
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

During $$\alpha$$-decay, atomic mass of parent nuclei is

A
decreased by 2 units
B
increased by 2 units
C
decreased by 4 units
D
increased by 4 units
3
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
4
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
COMEDK Subjects