NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1313 - 1316 of 2320

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Question number: 1313

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MCQ▾

Question

A student takes 50 gm wax (specific heat = 0.9 kcal/kg°C) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively.

Choices

Choice (4)Response

a.

1000 cal, 100°C

b.

2250 cal, 200°C

c.

1500 cal, 200°C

d.

2500 cal, 50°C

Question number: 1314

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Question

Energy of an α-particle, having de-Broglie wavelength of 0.004 Å is approximately.

Choices

Choice (4)Response

a.

1200 GeV

b.

1200 KeV

c.

1275 eV

d.

1200 MeV

Question number: 1315

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Question

A beam of electron accelerated through 70 kV strikes against a target. Which one of following

X-ray frequency will be missing?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1316

» Properties of Solids & Liquids » Heat Transfer » Convection

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MCQ▾

Question

A room is maintained at 20°C by a heater of resistance 20 ohm connected to 400 volt mains. The temperature is uniform throughout the room and heat is transmitted through a glass window of area 4 m 2 and thickness 0.2 cm. What will be the temperature outside? Given that thermal conductivity K for glass is 0.2 cal/m/°C/sec and J = 4.2 J/cal

Choices

Choice (4)Response

a.

24.15 °C

b.

15.023 °C

c.

15.25 °C

d.

All of the above

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