What is the name of the recently launched brand of National Cooperative Organics Ltd (NCOL)?
What is the Gross Merchandise Value (GMV) achieved by the Government e-Marketplace (GeM)?
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Under NEP 2020, what is the focus of the new National Curriculum Framework (NCF)?
One of your students has written an application to you urging that he wants to utilise the games period by studying science in the school library. You disapprove of this because you know that it is essential for students to play games as
To make assessment 'a useful and interesting process', one should be careful about:
Which of the following is an example of scaffolding?
What is the root-mean-square speed of helium atoms in a balloon of diameter 30.0 cm at 20.00C and 1.00 atm?
In a Young's double slit experiment, a small detector measures an intensity of illumination of I units at the centre of the fringe pattern. If one of the two (identical) slits is now covered, the measured intensity will be
Which of the following statements about bar magnets is correct ?
Which of the following will not increase the size and effect of eddy current?
If the coefficient of friction between an insect and bowl surface is μ and the radius of the bowl is r, the maximum height to which the insect can crawl in the bowl is
When a hydrogen atom, initially at rest emits, a photon resulting in transition n = 5 → n = 1, its recoil speed is about
Photons of energy 1eV and 2.5 eV successively illuminate a metal whose work function is 0. 5 eV. The ratio of the maximum speeds of the electrons emitted will be
If the voltage across the electrodes of a cathode ray tube is 500 volts then energy gained by the electrons is
The electric field at a distance 3R/2 rom the centre of a charged conducting spherical shell of radius R is E. The electric field at a distance R/2 from the centre of the sphere is
The north pole of a magnet is brought near a coil. The induced current in the coil as seen by an observer on the side of magnet will be
Which of the following is not an example of coherent source produced by the division of wavefront?
An observer looks at a tree of height 15 metre with a telescope of magnifying power 10. To him, the tree appears
Which one of the following is not an example of projectile?
Three masses of 500 g, 300 g and 100 g are suspended at the end of an ideal spring as shown and are in equilibrium. When the 500 g mass is suddenly removed, the system oscillated with a period of 2 s. When 300 g mass is also removed, it will oscillate with the period
Consider the magnetic field produced by a finitely long current carrying wire.
When a bar magnet is pushed towards the coil connected in series with a galvanometer, the pointer in the galvanometer G
A trolley of mass 200 kg moves with a uniform speed of 36 km/h on a frictionless track. A child of mass 20 kg runs on the trolley from one end to the other (10 m away) with a speed of 4 ms−1 relative to the trolley in a direction opposite to the its motion, and jumps out of the trolley. How much has the trolley moved from the time the child begins to run?
In which case are the atoms relatively rigidly fixed?
If the yellow light is replaced by the violet light then the interference fringes-