JEE Main 2020 (Online) 9th January Evening Slot | Simple Harmonic Motion Question 65 | Physics

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%

JEE Main 2019 (Online) 12th January Evening Slot

MCQ (Single Correct Answer)

-1

A simple harmonic motion is represented by :

y = 5 (sin 3 $$\pi $$ t + $$\sqrt 3 $$ cos 3 $$\pi $$t) cm

The amplitude and time period of the motion are :

10 cm, $${3 \over 2}$$ s

5 cm, $${2 \over 3}$$ s

5 cm, $${3 \over 2}$$ s

10 cm, $${2 \over 3}$$ s

JEE Main 2019 (Online) 12th January Morning Slot

MCQ (Single Correct Answer)

-1

A travelling harmonic wave is represented by the equation y(x,t) = 10^–3sin (50t + 2x), where, x and y are in mater and t is in seconds. Which of the following is a correct statement about the wave ?

The wave is propagating along the positive x-axis with speed 100 ms^–1

The wave is propagating along the positive x-axis with speed 25 ms^–1

The wave is propagating along the negative x-axis with speed 25 ms^–1

The wave is propagating along the negative x-axis with speed 100 ms^–1

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