Who has been appointed as the Chief Executive Officer of BharatPe?
‘The State of Food and Agriculture (SOFA)’ is the flagship report of which institution?
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At which location did Dhinidhi Desinghu clock the 'Best India Time' in the girl's 100m Freestyle event?
According to NEP 2020, what is the role of teachers in the new education system?
The basis of selection of a teaching aid is
Choose from the options given below:
Gifted students may be asked to spend more time on questions dealing with_____.
Electric flux will be maximum if the angle between the field lines and area vector is ______
An electric dipole will be in stable equilibrium if the angle between the axis of the dipole and the electric field is ________
In a thin rectangular metallic strip a constant current I flows along the positive x-direction, as shown in the figure. The length, width and thickness of the strip are l, w and d, respectively.A uniform magnetic field is applied on the strip along the positive y-direction. Due to this, the charge carriers experience a net deflection along the z-direction. This results in accumulation of charge carriers on the surface PQRS and appearance of equal and opposite charges on the face opposite to PQRS. A potential difference along the z-direction is thus developed. Charge accumulation continues until the magnetic force is balanced by the electric force. The current is assumed to be uniformly distributed on the cross-section of the strip and carried by electrons.
Q.6. Consider two different metallic strips (1 and 2) of the same material. Their lengths are the same, widths are w1 and w2 and thicknesses are d1 and d2 respectively. Two points K and M are symmetrically located on the opposite faces parallel to the x-y plane (see figure). V1 and V2 are the potential differences between K and M in strips 1 and 2, respectively. Then, for a given current I flowing through them in a given magnetic field strength B, the correct statement(s) is(are)
A car covers a distance of 5 km in 5 mins, its average speed is equal to:
The height above surface of earth where the value of gravitational acceleration is one fourth of that at surface, will be
Under forced oscillation, the phase of the harmonic motion of the particle and phase of driving force
The product of energy and time is called action. The dimensional formula for action is same as that for
Two point charges 2μC and 8μC are placed 12 cm apart. The position of point from 2μC charge, where the electric field intensity is zero is:
One mole of hydrogen gas is heated at constant pressure from 300 K to 420 K. Calculate the increase in its internal energy.
Pick out the temperature at which iron becomes paramagnetic?
A steady current is passing through a linear conductor of non-uniform cross-section. The current density in the conductor is
A block of mass 2kg rests on a plane inclined at an angle of 30o with the horizontal. The coefficient of friction between the block and the surface is 0.7. The frictional force acting on the block is
If work function of a metal plate is negligible then the K.E.of the photoelectrons emitted when radiations of 1000 Â are incident on the metal surface is
The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4eV. The stopping potential is Volts is
A slide projector gives a magnification of 10. If a slide of dimensions 3 cm x 2 cm is projected on the screen, the area of the image on the screen is:
12 docs|30 tests
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12 docs|30 tests
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