NEET Physics: Questions 1811 - 1813 of 2098

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Question number: 1811

» Oscillations and Waves » Reflection of Waves

Assertion-Reason▾

Assertion (Ꭺ)

Velocity of particles, while crossing mean position (in stationary waves) varies from maximum at antinodes to zero at nodes.

Reason (Ꭱ)

Amplitude of vibration at antinodes is maximum and at nodes, the amplitude is zero, and all particles between two successive nodes cross the mean position together.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 1812

» Oscillations and Waves » Doppler Effect in Sound

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.

545 Hz

b.

550 Hz

c.

532 Hz

d.

430 Hz

Question number: 1813

» Experimental Skills » Multimeter

MCQ▾

Question

Circuit diagram consists of voltmeter, ammeter, battery.

Circuit Diagram Consists of Voltmeter, Ammeter, Battery.

In figure circuit diagram consists of voltmeter, ammeter, battery and resistors is shown.

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.

(1.2±0.05)kΩ

b.

(1.5±0.08)kΩ

c.

(1.5±0.05)kΩ

d.

(1.2±0.08)kΩ

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