NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1813 - 1817 of 2320

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Question number: 1813

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

A whistle giving out 461 Hz approaches a stationary observer at a speed of 44 m/s. The frequency heard by the observer in Hz is

Choices

Choice (4)Response

a.

430 Hz

b.

550 Hz

c.

532 Hz

d.

545 Hz

Question number: 1814

» Experimental Skills » Multimeter

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MCQ▾

Question

Circuit diagram consists of voltmeter, ammeter, battery.

Circuit Diagram Consists of Voltmeter, Ammeter, Battery

In the circuit shown, voltmeter is ideal and its least count is 0.1 V. The least count of ammeter is 1 mA. Let reading of the voltmeter is 30.0 V and the reading of ammeter is 0.020 A. Calculate the value of resistance R within error limits.

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1815

» Communication System » Bandwidth of Transmission Medium

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MCQ▾

Question

Audio signal cannot be transmitted because

Choices

Choice (4)Response

a.

The transmitting antenna length is very large and impracticable

b.

The transmitting antenna length is very small to design

c.

The signal cannot be amplified for distance communication

d.

The signal has more noise

Question number: 1816

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

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MCQ▾

Question

In short wave communication which of the following frequencies will be reflected back by the ionosphere layer, having electron density 5 ⨯ 10 9 per m 3.

Choices

Choice (4)Response

a.

0.14 MHz

b.

0.63 MHz

c.

0.18 MHz

d.

0.28 MHz

Question number: 1817

» Gravitation » Universal Law of Gravitation

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MCQ▾

Question

A satellite of mass m is revolving in a circular orbit of radius r. The relation between the angular momentum J of satellite and mass m of earth will be –

Choices

Choice (4)Response

a.

b.

c.

d.

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