NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2108 - 2110 of 2320

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Question number: 2108

» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole

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Appeared in Year: 2017

MCQ▾

Question

A long solenoid of diameter has turn per meter. At the centre of the solenoid, a coil of turns and radius is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to from in . If the resistance of the coil is the total charge flowing through the coil during this time is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 2109

» Oscillations and Waves » Doppler Effect in Sound

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Appeared in Year: 2017

MCQ▾

Question

Two cars moving in opposite directions approach each other with speed of and respectively. The driver of the first car blows a horn having a frequency . The frequency heard by the driver of the second car is [velocity of sound ]:

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 2110

» Kinematics » Relative Velocity

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Appeared in Year: 2017

MCQ▾

Question

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time . On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time . The time taken by her to walk up on the moving escalator will be:

Choices

Choice (4)Response

a.

b.

c.

d.

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