NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 677 - 681 of 2320

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Question number: 677

» Magnetic Effects of Current and Magnetism » Ampere's Law

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MCQ▾

Question

charge moves in magnetic field B with velocity v making an angle θ with B. The force on the charge will be maximum if,

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 678

» Electromagnetic Induction & Alternating Currents » Faraday's Law

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MCQ▾

Question

An airplane having a distance of 50 meter between the edges of its wings is flying horizontally with a speed of 360km/hour. If the vertical component of earth’s magnetic field is 4 x 10 -4 weber/m 2, then the induced emf between the edges of its wings will be -

Choices

Choice (4)Response

a.

0.2 V

b.

20 V

c.

2 mV

d.

2 V

Question number: 679

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

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Assertion-Reason▾

Question

Assertion (Ꭺ)

If an electron, while coming vertically from outer space, enters the earth’s magnetic field, it is deflected towards west.

Reason (Ꭱ)

Electron has negative charge.

Choices

Choice (4)Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

Ꭺ is true but Ꭱ is false

Passage

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

A charge particles q enters in a magnetic field with the velocity . Neglect any force other than magnetic force. Now answer the following question.

Question number: 680 (1 of 3 Based on Passage) Show Passage

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

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MCQ▾

Question

When particle arrives at any point P (2,2) then force acting on it, will be -

Choices

Choice (4)Response

a.

2

b.

8q

c.

d.

Zero

Question number: 681 (2 of 3 Based on Passage) Show Passage

» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field

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MCQ▾

Question

Which of the following is true for the direction of magnetic force?

Choices

Choice (4)Response

a.

If x < y then force works along (+z) direction

b.

If x > y then force works along (-z) direction

c.

None

d.

If x > y then force works along (+z) direction

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