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Preeti Dabral 2 years ago
Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.
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Yogita Ingle 4 years, 2 months ago
A progressive wave is defined as the onward transmission of the vibratory motion of a body in an elastic medium from one particle to the successive particle.
When two progressive waves of same amplitude and wavelength travelling along a straight line in opposite directions superimpose on each other, stationary waves are formed.
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Yogita Ingle 4 years, 4 months ago
Principle Axis: The straight line passing through the pole P and the centre of curvature C of the mirror, is called principal axis of the mirror.
Normal: The normal at any point of the spherical mirror is the straight line obtained by joining that point with the centre of the mirror.
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Yogita Ingle 4 years, 5 months ago
Electric potential at a point in an Electric field (for instance, let's take it as uniform) is the amount of work done in moving a unit positive charge from infinity to that point against electric forces. (attraction or repulsion)
whereas Electric potential difference between two points in an Electric field is defined as the amount of work done in moving unit positive charge from one point to another point against the electric force.
In other words, Potential difference is simply the difference of scalar potentials between two points or anything you consider.
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Yogita Ingle 4 years, 5 months ago
The human eye can focus objects at different distances by adjusting the focal length of eye lens due to the power of accomodation of human eye.
Yogita Ingle 4 years, 5 months ago
The human eye can focus objects at different distances by adjusting the focal length of eye lens due to the power of accomodation of human eye.
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SI unit of magnetic field is tesla (T). So, one tesla is that magnetic field in which a charge of one coulomb moving with a velocity of 1 m/s perpendicular to the magnetic field experiences a force of one newton.
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Gaurav Seth 5 years, 2 months ago
Potential difference :
Potential difference is also defined as work done to move a unit charge from one point to another.
V = W / Q
Or
Potential difference =Work done / Charge
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The critical angle is the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected.
Posted by Darpan Verma 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
Potential difference (V)= 15 V
Charge (Q)= 3C
We know that
The potential difference(p.d) between two point in an electric circuit is defined as the amount of work done in moving a unit charge from one point to the other point.
Potential difference (V) = work done (W)/Charge (Q)
V= W/Q
Putting the values in the above formula we get:
15 V = W / 3 C
W= 15 V × 3 C
W= 45 J
Hence, the work done in moving the charge is 45 J.
Posted by Davinder Kaur 5 years, 6 months ago
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Yogita Ingle 5 years, 6 months ago
Concave Lens | Convex Lens |
The image formed is upright, virtual, and smaller size than the object. The position of the image formed is in between the lens and the object regardless of object’s position |
The image formed is inverted, real, and smaller than the object when the object is placed at Focus. The image formed is inverted, real, and same size as the object when the object is placed at 2F. The image formed is inverted, real, and larger than the object when the object is placed between 2F and F. No image is formed when the object is placed at Focus (F). The image formed is upright, Virtual, and larger than the object when the object is placed on the same side of the lens. |
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