NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1829 - 1833 of 2184

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Question number: 1829

» Experimental Skills » Diode Identification

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MCQ▾

Question

An LED operates under which biasing condition?

Choices

Choice (4) Response

a.

Reverse bias

b.

Can operate both in forward and reverse bias

c.

Forward bias

d.

Question does not provide sufficient data or is vague

Question number: 1830

» Gravitation » Escape Velocity

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MCQ▾

Question

The ratio of the radius of the Earth to that of the moon is 10. The ratio of g on earth to the moon is 6. The ratio of the escape velocity from the earth’s surface to that from the moon is approximately –

Choices

Choice (4) Response

a.

10

b.

4

c.

2

d.

8

Question number: 1831

» Experimental Skills » Meter Bridge

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MCQ▾

Question

To calculate an unknown resistance with the help of a meter bridge why is it advised to change the gap with the known and unknown resistance?

Choices

Choice (4) Response

a.

To eliminate the resistance of the gap.

b.

To balance the known and unknown resistance.

c.

To include the resistance of the connecting wire and copper strip

d.

To eliminate the resistance of the connecting wire and copper strip

Question number: 1832

» Oscillations and Waves » Harmonics

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MCQ▾

Question

The loudness and the pitch of a sound depends on

Choices

Choice (4) Response

a.

Intensity and frequency

b.

Frequency and number of harmonics

c.

Intensity and velocity

d.

Frequency and velocity

Passage

Read the passage given below and answer the questions that follows:

It can be assumed that orbits of earth and mars are nearly circular around the sun. It is proposed to launch an artificial planet around the sun such that its apogee is at the orbit of mars while its perigee is at the orbit of earth. Let T e and T m be periods of revolution of earth and mars. Further the variables are assigned the meanings as follows.

M e → Mass of earth

M m → Mass of mars

L e → Angular momentum of earth around the sun

L m → Angular momentum of mars around the sun

R e → Semi major axis of earth’s orbit.

R m → Semi major axis of mars orbit.

M → Mass of the artificial planet

E e → Total energy of earth

E m → Total energy of mars.

Question number: 1833 (1 of 2 Based on Passage) Show Passage

» Gravitation » Geo-Stationary Satellites

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MCQ▾

Question

Time period of revolution of the artificial planet about sun will be (neglect gravitational effects of earth and mars)

Choices

Choice (4) Response

a.

b.

c.

d.