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A black body at 227^(@)C radiates heat a...

A black body at `227^(@)C` radiates heat at the rate of `7 cal cm^(-2) s^(-1)`. At a temperature of `727^(@)C`, the rate of heat radiated in the same unit will be

A

80

B

60

C

50

D

112

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The correct Answer is:
D
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 21-PAPER 1 (PHYSICS & CHEMISTRY)
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  2. In Young's double slit experiment, angular width of fringes is 0.20^@ ...

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  4. The component of vector A=2hati+3hatj along the vector hati+hatj is

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  6. The string of pendulum of length l is displaced through 90^(@) from th...

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  7. The velocity of sound in air at NTP is 330 m/s. What will be its value...

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  8. When light is incident on a doubly refracting crystal, two refracted r...

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  9. A bullet of mass 0.05 kg moving with a speed of 80m//s enters a wooden...

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  10. Doppler's effect is sound in addition of relative velocity between sou...

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  11. An e.m.f. E=4cos(1000t)volt is applied to an LR circuit of inductance ...

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  12. Consider telecommunication through optical fibres. Which of the follow...

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  13. The expression for thermo emf in a thermocouple given by the relation ...

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  14. Minimum number of capacitors of 2muF capacitance each required to obta...

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  15. A charge q is placed at the centre of the open end of a cylindrical ve...

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  17. Two masses m1 and m2 (m1gtm2) are connected by massless flexible and i...

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  18. When a ferromagnetic material is heated to temperature above its Curie...

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  19. A rectangular vessel when full of water takes 10 minutes to be emptied...

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  20. A layer of glycerine of thickness 1 mm is present between a large surf...

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