- APermanent dipole moment.
- BNo permanent dipole moment.
- CBoth a and b.
- DNone.
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A thin prism
with angle 6° and made from glass of refractive index 1.54 is combined with another thin prism P2 of refractive index 1.72 to produce dispersion without deviation. The angle of prism
will be
|
(a) 5° 24’ |
(b) 4° 30’ |
(c) 6° |
(d) 8° |
A region surrounding a stationary electric dipoles has
|
(a) Magnetic field only |
(b) Electric field only |
|
(c) Both electric and magnetic fields |
(d) No electric and magnetic fields |
Which source is associated with a line emission spectrum
|
(a) Electric fire |
(b) Neon street sign |
(c) Red traffic light |
(d) Sun |
To deposit one gm equivalent of an element at an electrode, the quantity of electricity needed is
|
(a) One ampere |
(b) 96000 amperes |
(c) 96500 farads |
(d) 96500 coulombs |
Assertion : Red shift confirms that the universe is expanding
Reason : Wavelength of red light is maximum in the visible region
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Four lowest energy levels of H-atom are shown in the figure. The number of possible emission lines would be

|
(a) 3 |
(b) 4 |
(c) 5 |
(d) 6 |