# Magnetic Effects of Current and Magnetism-Biot - Savart Law (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 9 - 11 of 11

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## Question number: 9

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

### Question

A circular coil of 0.2 m diameter has 1000 turns and carries a current of 0.1 ampere. The intensity of magnetic field at the center of the coil is-

### Choices

Choice (4) Response

a.

62.8 x 10 -4 N/A∙m

b.

6.28 x l0 -4 N/A∙m

c.

62.8 x 10 -5 N/A∙m

d.

6.28 x 10 -5 N/A∙m

## Question number: 10

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

### Question

A circular arc of wire of radius of curvature r subtends an angle of radian at its center. If current i is flowing in it then the magnetic induction at its center is –

### Choices

Choice (4) Response

a.

b.

c.

d.

0

## Question number: 11

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

### Question

A current i is flowing in a conductor PQRST shaped as shown in the figure. The radius of curved part QRS is r and length of straight portions PQ and ST is very large. The magnetic field at the center O of the curved part is –

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page