Day 101: JEE Mains Physics
5 questions. Try each one first, then open its answer.
Question 1
Nuclei. Asked 2 times: 28 Jul 2022*, 10 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked
92The half-life of a radioactive substance is . The time taken, for disintegrating th part of its original mass will be:Tap an option to check your answer.
Question 2
Oscillations. Asked 2 times: 2021 Paper 4*, 10 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked
19A particle executes S.H.M. of amplitude A along -axis. At , the position of the particle is and it moves along positive -axis the displacement of particle in time is , then the value will be:Tap an option to check your answer.
Question 3
Semiconductor Electronics. Asked 2 times: 2021 Paper 21*, 10 Apr 2023 (* = numbers or wording changed that year) See all 2 times it was asked
3A zener diode of power rating is to be used as voltage regulator. If the zener diode has a breakdown of and it has to regulate voltage fluctuating between and . The value of resistance for safe operation of diode will be:Tap an option to check your answer.
Question 4
Magnetism and Matter. Asked 2 times: 14 Jun 2022, 8 Apr 2023 See all 2 times it was asked
106Given below are two statements; one is labelled as Assertion A and the other is labelled as Reason R Assertion A: Electromagnets are made of soft iron. Reason R: Soft iron has high permeability and low retentivity. In the light of above, statements, choose the most appropriate answer from the options given below.Tap an option to check your answer.
Question 5
Moving Charges and Magnetism. Asked 2 times: 24 Jan 2023, 8 Apr 2023 See all 2 times it was asked
120The ratio of magnetic field at the centre of a current carrying coil of radius to the magnetic field at distance from the centre of coil on its axis is . The value of is___