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A conveyor belt is moving at a constant speed of 2 m/s, a box is gently dropped on it. The coefficient of friction between them is 0.5. The distance that the box will move relative to the belt before coming to rest on it is?

A conveyor belt is moving at a constant speed of 2 m/s, a box is gently dropped on it. The... View Article

Refining of silver is done by

Refining of silver is done by? polling van Arkel method liquation cupellation The correct option is iv. cupellation

Which term of the AP 3,15,27,39,….. will be 132 more than its 54th term?

Given AP: 3,15,27,39,…. an=a+(n-1)d a=3 d=15-3=12 n=54 a54=a+(n-1)d =3+(54-1)x12 =3+53×12 =639 Term which is 132 more than its 54th terms... View Article

Express 64 as the sum of 8 odd numbers

64 as the sum of 8 odd number = 82 = n2 n=8 It is written as: 1+3+5+7+9+11+13+15

Pb and Sn are extracted from their chief ore by

Pb and Sn are extracted from their chief ore by? self reduction and electrolysis respectively electrolysis and self reduction respectively... View Article

The number of integers greater than 6000 that can be formed using the digits 3,5,6,7,8 without repetition is?

The number of integers greater than 6000 that can be formed using the digits 3,5,6,7,8 without repetition is? 72 120... View Article

If the list price of a book is reduced by Rs 5, a person can buy 5 more books for Rs 300. Then the original cost of the book is?

Let the original list price of the book be = Rs x Original number of books purchased = 300/x When... View Article

Which of the following acts as a circuit protecting device

Which of the following acts as a circuit protecting device? fuse switch inductor conductor The correct option is i. fuse

A system is provided with 50 Joules of heat and the work done on the system is 10 joules. What is the change in the internal energy of the system in Joules?

A system is provided with 50 Joules of heat and the work done on the system is 10 joules. What... View Article

A piece of ice falls from a height h so that t melts completely. Only one-quarter of the heat produced is absorbed b the ice, and all energy of ice gets converted into heat during its fall. The value of h is?

A piece of ice falls from a height h so that t melts completely. Only one-quarter of the heat produced... View Article

Force between two identical short bar magnets whose centres are r metre apart is 4.8 N when their axes are in the same line. If the separation is increased to 2r metre, the force between them is reduced to?

Given, Two bar magnets placed axially at distance r Force between them = 4.8N Solution: Force between two magnetic dipoles... View Article

A dye absorbs a photon of wavelength λ and re-emits the same energy into two photons of wavelength λ1 and λ2 respectively. The wavelength λ is related to λ1 and λ2 as?

Let E be the energy of a photon with wavelength λ E1 be the energy of a photon with wavelength λ1 E2... View Article

The kinetic energy needed to project a body of mass m from the earth surface to infinity is? (1) mgR/2 (2) mgR/4 (3) mgR (4) 2mgR

Answer: (3) mgR Kinetic energy of an object is the measure of the work an object can do by virtue... View Article

If 2a=3b=4c, then a:b:c?

Given: 2a=3b=4c Dividing both sides with LCM of 2,3,4 which is 12, we get, a/6=b/4=c/3 Therefore, a:b:c = 6:4:3

Left shift of oxyhaemoglobin curve is noticed under

Left shift of oxyhaemoglobin curve is noticed under? normal temperature and pH low temperature and high pH low pH and... View Article

A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V esu. If e and m are charge and mass of an electron, respectively, then the value of h/λ is given as?

Kinetic energy = eV = 1/2mu2 u = √2eV/m eq.1 Where u is the velocity of the electrons From de Broglie... View Article

In a uniform magnetic field of induction B a wire in the form of a semicircle of radius r rotates about the diameter of the circle with angular frequency ω. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R the mean power generated per period of rotation is?

Answer: Uniform magnetic field of induction = B Radius = r Frequency = ω The axis of rotation is perpendicular to... View Article

A block of mass 2 kg is on a horizontal surface. The coefficient of static and kinetic friction are 0.6 and 0.2. The minimum horizontal force required to start the motion is applied and if it is continued, the velocity acquired by the body at the end of the 2nd second is?

A block of mass 2 kg is on a horizontal surface. The coefficient of static and kinetic friction are 0.6... View Article

Hirudin is

Hirudin is? an antibiotic produced by a genetically engineered Escherichia coli a lysine-rich protein produced by Hordeum vulgare an anticoagulant... View Article

Energy required to move a body of mass m from an orbit of radius 2R to 3R is?

Energy required to move a body of mass m from an orbit of radius 2R to 3R is? GMm/12R2 GMm/6R... View Article

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