Magnetic Effects of Current and Magnetism (NEET Physics): Questions 132 - 137 of 152

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 132

» Magnetic Effects of Current and Magnetism » Bar Magnet

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.

101wbm2

b.

108wbm2

c.

104wbm2

d.

1012wbm2

Question number: 133

» Magnetic Effects of Current and Magnetism » Hysteresis

MCQ▾

Question

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

Choices

Choice (4) Response
a.

Current loss

b.

Voltage loss

c.

hysteresis loss

d.

all

Question number: 134

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

MCQ▾

Question

Susceptibility of ferromagnetic substance is

Choices

Choice (4) Response
a.

1

b.

> 1

c.

0

d.

< 1

Question number: 135

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

MCQ▾

Question

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

Choices

Choice (4) Response
a.

μr<1,χ>0

b.

μr>1,χ<0

c.

μr>1,χ>0

d.

μr<1,χ<0

Question number: 136

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

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.

θ=450

b.

θ=1200

c.

θ=00

d.

θ=900

Question number: 137

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

Assertion-Reason▾

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. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

Sign In