Magnetic Effects of Current and Magnetism-Ampere's Law [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 8 - 12 of 19

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Question 8

Question MCQ▾

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.

Edit

Question 9

Question MCQ▾

An air-solenoid has 500 turns of wire in its 40 cm length. If the current in the wire be 1.0 ampere then the magnetic field on the axis inside the solenoid is –

Choices

Choice (4)Response

a.

0.157 gauss

b.

15.7 gauss

c.

0.0157 gauss

d.

1.57 gauss

Edit

Question 10

Question MCQ▾

A long straight wire carries a constant current distributed uniformly over a cross section perpendicular to the axis of the wire. If the current density is . The magnitudes of the magnetic field at

(a) 3.0 mm from the axis of the wire and

(b) 6.0 mm from the axis of the wire is:-

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 11

Question MCQ▾

A current of flows through two long parallel wires. The magnetic force on each wire is If their currents makes doubled and separation between them makes of initial value then magnetic force per unit length of each wire becomes –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 12

Appeared in Year: 2016

Question MCQ▾

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is . It is then bent into a circular coil of turns. The magnetic field at the centre of this coil of turns will be –

Choices

Choice (4)Response

a.

b.

c.

d.

Edit