1

JEE Main 2021 (Online) 16th March Evening Shift

Numerical

+4

-1

A closed organ pipe of length L and an open organ pipe contain gases of densities $$\rho$$

_{1}and $$\rho$$_{2}respectively. The compressibility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open pipe is $${x \over 3}L\sqrt {{{{\rho _1}} \over {{\rho _2}}}} $$ where x is ___________. (Round off to the Nearest Integer)Your input ____

2

JEE Main 2021 (Online) 26th February Morning Shift

Numerical

+4

-1

The mass per unit length of a uniform wire is 0.135 g/cm. A transverse wave of the form y = $$-$$ 0.21 sin (x + 30t) is produced in it, where x is in meter and t is in second. Then, the expected value of tension in the wire is x $$\times$$ 10

^{$$-$$2}N. Value of x is _________. (Round off to the nearest integer)Your input ____

3

JEE Main 2021 (Online) 25th February Evening Shift

Numerical

+4

-1

The percentage increase in the speed of transverse waves produced in a stretched string if the tension is increased by 4%, will be __________%.

Your input ____

4

JEE Main 2021 (Online) 24th February Evening Shift

Numerical

+4

-1

Two cars are approaching each other at an equal speed of 7.2 km/hr. When they see each other, both blow horns having frequency of 676 Hz. The beat frequency heard by each driver will be ___________ Hz. [Velocity of sound in air is 340 m/s.]

Your input ____

Questions Asked from Waves (Numerical)

Number in Brackets after Paper Indicates No. of Questions

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