NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1068 - 1072 of 2142

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Question number: 1068

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Assertion-Reason▾

Assertion (Ꭺ)

When capacitive reactance is smaller than the inductive reactance in LCR current, e. m. f. leads the current.

Reason (Ꭱ)

The phase angle is the angle between the alternating e. m. f. and alternating current of the circuit.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Question number: 1069

» Ray Optics » Deviation and Dispersion of Light by a Prism

Assertion-Reason▾

Assertion (Ꭺ)

A rainbow cannot be seen at noon, when the sun is high in the sky.

Reason (Ꭱ)

A rainbow is formed by dispersion of light.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 1070

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

Calculate the dispersive power for crown glass from the (given data: )

Choices

Choice (4) Response

a.

0.0163

b.

0.0183

c.

0.0112

d.

0.0142

Question number: 1071

» Electromagnetic Waves » Electromagnetic Waves & Characteristics

MCQ▾

Question

A wave is propagating in a medium of dielectric constant 2 and relative magnetic permeability 50. The wave impedance of such a medium is

Choices

Choice (4) Response

a.

1883 Ω

b.

376.6Ω

c.

3776 Ω

d.

Question number: 1072

» Ray Optics » Total Internal Reflection

MCQ▾

Question

Mirages are observed in deserts due to,

Choices

Choice (4) Response

a.

Total internal reflection of light

b.

Interference of light

c.

Dispersion of light

d.

Double refraction of light

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