The string AB vibrates in two loops with a tuning fork when block hangs in air. Now block is completely immersed in water, the string vibrates in three loops with same tuning fork. The specific gravity of block is :

1.2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.8

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

5 / 9

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $1.8$
$\frac{T_{1}}{T_{2}} = \frac{(3)^{2}}{(2)^{2}} = \frac{9}{4}$ , $T_{2} = T_{1} - B ⟹ B = T_{1} - T_{2}$
$s p e c i f i c g r a v i t y o f b l o c k = \frac{w t . i n a i r}{l o s s i n w t . i n w a t e r} = \frac{T_{1}}{T_{1} - T_{2}}$
= $\frac{1}{1 - \frac{T_{2}}{T_{1}}} = \frac{1}{1 - \frac{4}{9}} = \frac{9}{5} = 1.8$

Suggest Corrections

Similar questions

Q. A string under tension of

129.6 N

produces

10

beats/ second, when it vibrates along with a tuning fork. When the tension in the string is increased to

160 N

, it vibrates in unison with the tuning fork. Then, frequency of the tuning fork is

Figure (15-E11) shows a string stretched by a block going over a pulleys. The string vibrates in its tenth harmonic in unison with a particular tuning fork. When a beaker containing water is brought under the block so that the block is completely dipped into the beaker, the string vibrates in its eleventh harmonic. Find the desnity of the material of the block.

A one metre long stretched string having a mass of 40 g is attached to a tuning fork. The fork vibrates at 128 Hz in a direction perpendicular to the string. What should be the tension in the string if it is to vibrate in four loops ?

Q. A one-metre long stretched string having a mass of 40 g is attached to a tuning fork. The fork vibrates at 128 Hz in a direction perpendicular to the string. What should be the tension in the string if it is to vibrate in four loops?

Q. A one metre long stretched string having a mass of 40 g is attached to a tuning fork. The fork vibrates at 128 Hz in a direction perpendicular to the string. What should be the tension in the string if it is to vibrate in four loops?

Join BYJU'S Learning Program

The string AB vibrates in two loops with a tuning fork when block hangs in air. Now block is completely immersed in water, the string vibrates in three loops with same tuning fork. The specific gravity of block is :

The correct option is A 1.8T1T2=(3)2(2)2=94, T2=T1−B⟹B=T1−T2specificgravityofblock=wt.inairlossinwt.inwater=T1T1−T2= 11−T2T1=11−49=95=1.8