NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1883 - 1887 of 2142

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1883

» Communication System » Bandwidth of Transmission Medium

MCQ▾

Question

In a communication system, noise is most likely to affect the signal

Choices

Choice (4) Response

a.

In the information source I

b.

At the transmitter

c.

In the channel or in the transmission line

d.

None of the above

Question number: 1884

» Gravitation » Orbital Velocity of a Satellite

Assertion-Reason▾

Assertion (Ꭺ)

The speed of revolution of an artificial satellite revolving very near the earth is 8 kms -1.

Reason (Ꭱ)

Orbital velocity of a satellite, become independent of height of near satellite.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

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

Question number: 1885

» Oscillations and Waves » Beats

MCQ▾

Question

A source of sound of frequency 233 Hz is moving rapidly towards a wall with a velocity of 3.5 m/s. The speed of sound is 330 m/s. If the observer is between the wall and the source, then the beats heard per second will be,

Choices

Choice (4) Response

a.

4.2 Hz

b.

5.3 Hz

c.

4.9 Hz

d.

Zero

Question number: 1886

» Gravitation » Escape Velocity

MCQ▾

Question

Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. Assuming that the radii of the planet and the earth are the same, then –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1887

» Oscillations and Waves » Beats

MCQ▾

Question

A sound wave of frequency travels horizontally to the right. It is reflected from a large vertical plane surface moving to the left with a speed V. The speed of sound in the medium is c.

Choices

Choice (4) Response

a.

The number of beats hears by a stationary listener to the left of the reflecting surface is

b.

The frequency of the reflected wave is

c.

The number of waves striking the surface per second is

d.

The wavelength of the reflected wave is

f Page