A piece of metal weighs 45 g in air and 25 g in a liquid of density 1.5 x 103 kg-m-3 kept at 30°C. When the temperature of the liquid is raised to 40°C, the metal piece weighs 27 g. The density of liquid at 40°C is 1.25 x 103 kg-m-3. The coefficient of linear expansion of metal is
The rms value of the electric field of the light coming from the Sun is 720 N C−1. The average total energy density of the electromagnetic wave is
In Young's double slit experiment, the 10th maximum of wavelength λ1 is at a distance of y1 from the central maximum. When the wavelength of the source is changed to λ2, 5th maximum is at a distance of y2 from its central maximum. The ratio y1/y2 is
Three capacitors C1 = 3 μF, C2 = 6 μF and C3 = 12 μF are joined in series. This series combination is connected to a 14 volt source. The P.D across the plates of capacitor C2 is
In the infinite ladder network shown below, if R = 1.235 Ω, then the effective resistance between the points a and b (approximately) is (√5 = 2.235)
In the circuit shown below, if the tap key K is pressed at time t = 0, then which of the following statements is false?
Eight identical spherical liquid drops each charged to potential of 2 volt. They coalesce to make one big spherical liquid drop, whose potential is
A point charge Q is located at a distance R/2 From the centre of an uncharged conducting spherical shell as shown in below figure. The electric field at a distance 3R from the point charge is
Directions : Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
Assertion : The change in kinetic energy of a particle is equal to the work done on it by the net force.
Reason: Change in kinetic energy of particle is equal to work done only in case of a system of one particle.
During the adiabatic expansion of two moles of a gas, the internal energy is found to decrease by 2 J. The work done during the process on the gas will be equal to
The solubility product of silver bromide is 5 x 10-13. The quantity of potassium bromide with molar mass 120 g/mol to be added to 1 litre of 0.05 M solution of silver nitrate to start the precipitation of AgBr is
An organic compound A, upon reacting with NH3, gives B. On heating, B gives C. C, in presence of KOH, reacts with Br2 to give CH3CH2NH2. A is
Which of the following compound has carbon with highest electronegativity?
At what phase of meiosis are there two cells, each with sister chromatids aligned at the spindle equator?
The phytohormone responsible for increasing the shelf life of cut flowers and vegetables also helps in
Statement-A: In animals, mitotic cell division is seen in the diploid somatic cells.
Statement-B: The plants can show mitotic divisions in both haploid & diploid cells.
Which of the following options about Compositae family is incorrect?
Which one is an important constituent of the renin-angiotensinogen-aldosterone system?
Which part of the nephron is responsible for the reabsorption of water and solutes from the filtrate?
Read the following statements A and B and choose the correct answer.
Statement-A : Movement is one of the significant features of living beings.
Statement-B : Flying is a form of locomotory movements in most of the birds, insects and certain mammals.
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