JEE Main 2020 (Online) 4th September Morning Slot | Waves Question 52 | Physics

JEE Main 2020 (Online) 4th September Morning Slot

MCQ (Single Correct Answer)

-1

For a transverse wave travelling along a straight line, the distance between two peaks (crests) is 5 m, while the distance between one crest and one trough is 1.5 m. The possible wavelengths (in m) of the are :

1, 3, 5, .....

$${1 \over 1},{1 \over 3},{1 \over 5},$$ .....

1, 2, 3, .....

$${1 \over 2},{1 \over 4},{1 \over 6},$$

JEE Main 2020 (Online) 3rd September Morning Slot

MCQ (Single Correct Answer)

-1

A uniform thin rope of length 12 m and mass 6 kg hangs vertically from a rigid support and a block of mass 2 kg is attached to its free end. A transverse short wavetrain of wavelength 6 cm is produced at the lower end of the rope. What is the wavelength of the wavetrain (in cm) when it reaches the top of the rope ?

JEE Main 2020 (Online) 2nd September Morning Slot

MCQ (Single Correct Answer)

-1

An amplitude modulated wave is represented by the expression
v_m = 5(1 + 0.6 cos 6280t) sin(211 × 10⁴ t) volts
The minimum and maximum amplitudes of the amplitude modulated wave are, respectively

$${3 \over 2}$$ V, 5 V

$${5 \over 2}$$ V, 8 V

5 V, 8 V

3 V, 5 V

JEE Main 2020 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

-1

Three harmonic waves having equal frequency $$\nu $$ and same intensity $${I_0}$$, have phase angles 0, $${\pi \over 4}$$ and $$ - {\pi \over 4}$$ respectively. When they are superimposed the intensity of the resultant wave is close to :

5.8 I₀

3 I₀

0.2 I₀

I₀

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