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General Knowledge Practice Science & Technology Study Material

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Astronomy

What distance is ray optics a good approximation when the aperture is 4 mn wide and the wavelength is 500 mn?

a) 32 m
b) 64 m
c) 16 m
d) 8 m

✔Answer

Correct Answer Is : 32 m

Solution Is :

When al light wave goes into water ,the quality that remains unchanged is its

a) Speed
b) Amplitude
c) Frequency
d) Wavelength

✔Answer

Correct Answer Is : Frequency

Solution Is :

Brillance of diamond is due to

a) Shape
b) Cutting
c) Reflection
d) Total internal reflection

✔Answer

Correct Answer Is : Total internal reflection

Solution Is :

A convex lens is in contact with a concave lens.The magnitutude of the ratio of their focal length is 2/3.Their equivalent focal length is 30 cm.What are their individual focal length?

a) (-75 cm,50 cm)
b) (-10cm, 15 cm)
c) 75 cm, 50 cm
d) (-15 cm, 10 cm)

✔Answer

Correct Answer Is : (-10cm, 15 cm)

Solution Is :

If a unit positive charge is taken from one point to another over an equipotential surface , then

a) Work is done on the charge.
b) Work is done by the charge.
c) Work done is constant
d) No work is done

✔Answer

Correct Answer Is : No work is done

Solution Is :

Constanton or manganin is widely used in wire wound standard resistors because of their

a) Tempearture independent resistivity.
b) Very weakly temerature dependent resistivity.
c) Strong dependence of resistivity on temerature.
d) Mechanical strength.

✔Answer

Correct Answer Is : Very weakly temerature dependent resistivity.

Solution Is :

An electric bulb is rated 220 V and 100 W.When it is operated on 110 V,the power consumed will be

a) 100 W
b) 75 W
c) 50 W
d) 25 W

✔Answer

Correct Answer Is : 25 W

Solution Is :

Boyle`s law is applicable for an

a) Adiabatic process
b) Isothermal process
c) Isobaric process
d) Isochoric process

✔Answer

Correct Answer Is : Isothermal process

Solution Is :

Sir C.V. Raman got nobel for his discovery about:

a) Theory of vision
b) Theory of vibration of musical instruments
c) Molecular spectra
d) Ultrasonics

✔Answer

Correct Answer Is : Molecular spectra

Solution Is :

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General Knowledge Practice Science & Technology Study Material

Astronomy

What distance is ray optics a good approximation when the aperture is 4 mn wide and the wavelength is 500 mn?

Correct Answer Is : 32 m

Solution Is :

When al light wave goes into water ,the quality that remains unchanged is its

Correct Answer Is : Frequency

Solution Is :

Brillance of diamond is due to

Correct Answer Is : Total internal reflection

Solution Is :

A convex lens is in contact with a concave lens.The magnitutude of the ratio of their focal length is 2/3.Their equivalent focal length is 30 cm.What are their individual focal length?

Correct Answer Is : (-10cm, 15 cm)

Solution Is :

If a unit positive charge is taken from one point to another over an equipotential surface , then

Correct Answer Is : No work is done

Solution Is :

Constanton or manganin is widely used in wire wound standard resistors because of their

Correct Answer Is : Very weakly temerature dependent resistivity.

Solution Is :

An electric bulb is rated 220 V and 100 W.When it is operated on 110 V,the power consumed will be

Correct Answer Is : 25 W

Solution Is :

Boyle`s law is applicable for an

Correct Answer Is : Isothermal process

Solution Is :

Sir C.V. Raman got nobel for his discovery about:

Correct Answer Is : Molecular spectra

Solution Is :

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