When a wave travels from one medium to another, the quantity which will not change is its:
- AAmplitude
- BVelocity
- CFrequency
- DIntensity
When a wave travels from one medium to another, the quantity which will not change is its:
Explanation:
When a wave travels from one medium to another, the amplitude, wavelength, velocity and intensity change but frequency does not change.
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A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black, the image will
|
(a) Be shifted downwards |
(b) Be shifted upwards |
|
(c) Not be shifted |
(d) Shift on the principal axis |
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 mT. What will be its value at the centre of the loop
|
(a) 250 m T |
(b) 150 m T |
(c) 125 m T |
(d) 75 m T |
Minimum energy required to takeout the only one electron from ground state of
is
|
(a) 13.6 eV |
(b) 54.4 eV |
(c) 27.2 eV |
(d) 6.8 eV |