PYQ Vault

Day 217: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Current Electricity. Asked once: 25 Jul 2022 (same type asked 3 times) See all 3 of this type

    115
    In a potentiometer arrangement, a cell of emf 1.20 V1.20\text{ }V gives a balance point at 36 cm36\text{ }cm length of wire. This cell is now replaced by another cell of emf 1.80 V1.80\text{ }V. The difference in balancing length of potentiometer wire in above conditions will be ____\_\_\_\_ cmcm.
  2. Question 2

    Electromagnetic Waves. Asked once: 29 Jul 2022 (same type asked 3 times) See all 3 of this type

    15
    Match List - I with List - II
    List - IList - II
    (A) UV rays(i) Diagnostic tool in medicine
    (B) X-rays(ii) Water purification
    (C) Microwave(iii) Communication, Radar
    (D) Infrared wave(iv) Improving visibility in foggy days
    Choose the correct answer from the options given below:

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  3. Question 3

    Laws of Motion. Asked once: 27 Jul 2022 (same type asked 3 times) See all 3 of this type

    4
    A bag is gently dropped on a conveyor belt moving at a speed of 2 m/s2\text{ }m/s. The coefficient of friction between the conveyor belt and bag is 0.4 Initially, the bag slips on the belt before it stops due to friction. The distance travelled by the bag on the belt during slipping motion is: [Take g=10 m/s−2g = 10\text{ }m/s^{- 2} ]

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  4. Question 4

    Nuclei. Asked once: 29 Jun 2022 (same type asked 3 times) See all 3 of this type

    95
    In the following nuclear reaction,
    D→αD1→β−D2→αD3⟶γD4D\overset{\alpha}{\rightarrow}D_{1}\overset{\beta^{-}}{\rightarrow}D_{2}\overset{\alpha}{\rightarrow}D_{3}\overset{\gamma}{\longrightarrow}D_{4}
    Mass number of DD is 182 and atomic number is 74. Mass number and atomic number of D4D_{4} respectively will be

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  5. Question 5

    Semiconductor Electronics. Asked once: 24 Jan 2023 (same type asked 3 times) See all 3 of this type

    20
    Given below are two statements: one is labelled as Assertion AA and the other is labelled as Reason RR Assertion A: Photodiodes are preferably operated in reverse bias condition for light intensity measurement. Reason: The current in the forward bias is more than the current in the reverse bias for a p−np - n junction diode. In the light of the above statements, choose the correct answer from the options given below:

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