Mehapatel

Conical pendulum is a small heavy mass attached with massless, flexible and inextensible string suspended from a rigid support and the mass is constraint to whirl in a horizontal circle with constant speed.Let us consider a conical pendulum consisting of point heavy mass m attached with massless, flexible and inextensible string of length l. Let the pendulum be suspended from a rigid support S and the mass be whirled with constant speed v in a horizontal circle of radius r so that the string makes an angle θ with the vertical.
The different forces acting on the mass are:(i) Weight mg in vert

Stalin’s collectivisation programme:(i)Stalin forced all peasants to cultivate in collective farms, kolkhoz. The bulk of land and implements were transferred to the ownership of collective farms. Peasants worked on the land, and the kolkhoz profit was shared. (ii)Enraged peasants resisted the authorities and destroyed their livestock. Between 1929 and 1931, the number of cattle fell by one-third.
(iii)Those who resisted collectivisation were severely punished. Many were deported and exiled.(iv)As they resisted collectivisation, peasants argued that they were not rich and they were not again

भारतका सबसे पूर्वी देशांतर 97 25 पू. है।

Let      (ii) Since  are perpendicular   

Let AB be the lamp-post and PQ the man, CP be his shadow at time t.Let AP PC = y. Also AB = 6 m, PQ = 2 m. Now ∆CAB and ∆CPQ are equiangular and hence similar.

The Mughal emperor, in 1765, appointed the Company as the Diwan of the provinces of Bengal.
(i)The Diwani allowed the Company to exploit the vast revenue resources of Bengal.
(i)This solved a major problem that the company had earlier faced.
(ii)Although its trade had expanded, it had to buy most of the goods in India with gold and silver imported from
Britain.
(iv)The overflow of gold from Britain stopped after the assumption of Diwani. Now revenue from India could
finance Company expenses.
(v)These revenues they used to purchase cotton and silk textiles in India, maintain Company tro

Olympic flag was created in 1913 by Baronde Coubertin. It was first inaugurated in Paris in June 1914. Olympic flag is made of white silk and contains five interlocking rings/circles in five colours representing five continents of the world namely America, Europe, Australia, Asia and Africa. The five rings have different colours namely yellow, green red blue and black. The interlocking of the ring circle symbolizes co-cooperation and friendship.

A. go V
8. 120 v
c. 220 v
D. 30 V
Answer :-
B. 120V
The magentic flux linked with the primary coil is given by
So, voltage across primary
VP = d@/dt = d@+dt) /dt
= 4 volt @ = constant)

Let AC be the tower and BE be the building. Let height of the tower be h m. It is given that the angles of depression of the top C and bottom A of the tower, observed from top of the building be 30° and 60° respectively.In right triangle CDE, we haveIn right triangle ABE, we haveComparing (i) and (ii), we getHence, the height of the tower is 40 m.

Consider one mole of an ideal gas enclosed in a cylinder fitted with movable frictionless piston.
Let the gas be heated at constant volume first. Let the temperature of the gas increase by dT when dQ quantity of heat is supplied.          = dU + PdV          = dU               By first law of thermodynamics,           dQ = dU + dW = dU + PdVor   CpdT = Cv x dT + RdTwhere  Cp, Cv and R are in same units.

Let the length of the pipe be h cm.Then, volume of iron pipe = volume of iron in the block.Volume of the block = ( 4.4 x 2.6 x 1 ) m3 = ( 440 x 260 x 100 ) cm3r = Internal radius of the pipe = 30 cmR = External radius of the pipe = ( 30 + 5 ) =  35 cm ∴ Volume of the iron pipe = ( External volume ) - ( internal volume )                                      = πR2h - πr2h= π (R2-r2) h = π (R+r) ( R-r) h= π ( 35 + 30 ) (35 - 30 ) x h= π x 65 x 5 x hNow, volume of iron in the pipe  = volume of iron in the block       ⇒ π x 65 x 5 x h = 440 x 260 x 100⇒227 x 65 x 5 x h =  440 x 260 x 100⇒ h =   44

There are many legends or stories about the discovery and origin of tea. According to a story, the tea was discovered in China. The Chinese Emperor used to drink boiled water. Once while boiling it, few leaves of a twig burning under the pot fell into it. The Emperor found the flavour delicious. Those were later named as tea leaves. Another legend says that an ancient Buddhist ascetic, Bodhidharma, cut off his eyelids when he felt sleepy during meditation. Ten tea plants grew out of his eyelids. Thus, the tea was discovered.