JEE Main 2020 (Online) 2nd September Evening Slot | Simple Harmonic Motion Question 63 | Physics

JEE Main 2020 (Online) 2nd September Evening Slot

MCQ (Single Correct Answer)

-1

The displacement time graph of a particle executing S.H.M is given in figure :
(sketch is schematic and not to scale) JEE Main 2020 (Online) 2nd September Evening Slot Physics - Simple Harmonic Motion Question 63 English

JEE Main 2020 (Online) 2nd September Evening Slot Physics - Simple Harmonic Motion Question 63 English

Which of the following statements is/are true for this motion?
(A) The force is zero at t = $${{3T} \over 4}$$
(B) The acceleration is maximum at t = T
(C) The speed is maximum at t = $${{T} \over 4}$$
(D) The P.E. is equal to K.E. of the oscillation at t = $${{T} \over 2}$$

(B), (C) and (D)

(A), (B) and (C)

(A) and (D)

(A), (B) and (D)

JEE Main 2020 (Online) 2nd September Morning Slot

MCQ (Single Correct Answer)

-1

Two identical strings X and Z made of same material have tension T_X and T_Z in them. If their fundamental frequencies are 450 Hz and 300 Hz, respectively, then the ratio T_X/T_Z is

2.25

0.44

1.25

1.5

JEE Main 2020 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

A wire of length L and mass per unit length 6.0 × 10^–3 kgm^–1 is put under tension of 540 N. Two consecutive frequencies that it resonates at are : 420 Hz and 490 Hz. Then L in meters is :

5.1 m

2.1 m

1.1 m

8.1 m

JEE Main 2020 (Online) 8th January Evening Slot

MCQ (Single Correct Answer)

-1

A simple pendulum is being used to determine th value of gravitational acceleration g at a certain place. Th length of the pendulum is 25.0 cm and a stop watch with 1s resolution measures the time taken for 40 oscillations to be 50 s. The accuracy in g is :

4.40%

3.40%

2.40%

5.40%

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