NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 673 - 678 of 2184

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Question number: 673

» Magnetic Effects of Current and Magnetism » Bar Magnet

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MCQ▾

Question

Calculate magnetic induction at a distance of 20 cm from a pole of strength 40 Am in air.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 674

» Magnetic Effects of Current and Magnetism » Hysteresis

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MCQ▾

Question

The use of study of hysteresis curve for a given material is to estimate the

Choices

Choice (4) Response

a.

Voltage loss

b.

all

c.

Current loss

d.

hysteresis loss

Question number: 675

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

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MCQ▾

Question

Susceptibility of ferromagnetic substance is

Choices

Choice (4) Response

a.

1

b.

> 1

c.

0

d.

< 1

Question number: 676

» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability

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MCQ▾

Question

The relative permeability is represented by and the susceptibility is denoted by for a magnetic substance. Then for a paramagnetic substance

Choices

Choice (4) Response

a.

b.

c.

d.

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