NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1308 - 1312 of 2184

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Question number: 1308

» Atoms and Nuclei » Hydrogen Spectrum

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MCQ▾

Question

The third line of Balmer series of an ion equivalent to hydrogen atom has wavelength of 108.5 nm The ground state energy of an electron of this ion will be

Choices

Choice (4) Response

a.

3.4 eV

b.

122.4 eV

c.

13.6 eV

d.

54.4 eV

Question number: 1309

» Properties of Solids & Liquids » Young's Modulus

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MCQ▾

Question

A steel wire is 6.0 m long and 2 mm in diameter. Young’s modulus of steel is 1.96 × 10 11 N/m 2. If a mass of 30 kg is suspended from it the elongation produced will be -

Choices

Choice (4) Response

a.

2.54 mm

b.

1.27 mm

c.

127 mm

d.

1.91 mm

Question number: 1310

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10 -6 /°C and in a steel vessel is 144 × 10 -6 / 0 C If a for steel is 12 × 10 -6 / 0 C, then that of glass is

Choices

Choice (4) Response

a.

36 × 10 -6 / o C

b.

9 × 10 - 6 / ° C

c.

6 × 10- 6 /°C

d.

27 × 10 -6 /°C

Question number: 1311

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

Work done by 0.1 mole of a gas at 27°C to double its volume at constant pressure is (R = 2 cal mol °K)

Choices

Choice (4) Response

a.

54 cal

b.

546 cal

c.

600 cal

d.

60 cal

Question number: 1312

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

The volume of a solid rubber ball when it is carried from the surface to the bottom of a 150 m deep lake decreases by 0.1 %. The value for bulk modulus of elasticity for rubber will be

Choices

Choice (4) Response

a.

15 × l0 8 Pa

b.

12 × l0 9 Pa

c.

21 × l0 6 Pa

d.

15 × 10 -4 Pa