Day 54: JEE Mains Physics
5 questions. Try each one first, then open its answer.
Question 1
Dual Nature of Radiation and Matter. Asked 3 times: 11 Apr 2023*, 31 Jan 2024*, 2 Apr 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked
17For a certain metal, when monochromatic light of wavelength is incident, the stopping potential for photoelectrons is . When the same metal is illuminated by light of wavelength , then the stopping potential becomes . The threshold wavelength for photoelectric emission for the given metal is . The value of is .Tap an option to check your answer.
Question 2
Alternating Current. Asked 3 times: 2021 Paper 20*, 4 Apr 2024*, 7 Apr 2025 (* = numbers or wording changed that year) See all 3 times it was asked
9An ac current is represented asThe r.m.s value of the current is.Tap an option to check your answer.
Question 3
Alternating Current. Asked 3 times: 2021 Paper 7, 2021 Paper 25, 24 Jan 2025 See all 3 times it was asked
16An alternating current is given by . The r.m.s. current will be :-Tap an option to check your answer.
Question 4
Moving Charges and Magnetism. Asked 3 times: 25 Jun 2022, 6 Apr 2023, 24 Jan 2025 See all 3 times it was asked
80A long straight wire of a circular cross-section with radius ' ' carries a steady current . The current is a uniformly distributed across this cross-section The plot of magnitude of magnetic field with distance from the centre of the wire is given byTap an option to check your answer.
Question 5
Thermodynamics. Asked 3 times: 1 Feb 2023, 4 Apr 2024, 9 Apr 2024 See all 3 times it was asked
20A sample of 1 mole gas at temperature is adiabatically expanded to double its volume. If adiabatic constant for the gas is , then the work done by the gas in the process is:Tap an option to check your answer.