Magnetic Effects of Current and Magnetism-Electric Charge Moving in Magnetic Field (NEET Physics): Questions 1 - 3 of 28

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Question number: 1

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

MCQ▾

Question

In the figure the two parallel wires PQ and ST are at 30 cm apart. The currents flowing in the wires are according to figure. The force acting over a length of 5m of the wires is-

Two parallel current carrying wires

Two Parallel Current Carrying Wires

In the figure the two parallel wires PQ and ST are at 30 cm apart. In PQ wire, current of 10 A is flowing and in ST wire, current of 15A is flowing.

(1) 5 x 10 -4 N (2) attraction

(3) 5 x 10 -8 N (4) repulsion

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 2

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

Assertion-Reason▾

Assertion (Ꭺ)

If an electron is not deflected while passing through a certain region of space, then only possibility is that there is no magnetic region.

Reason (Ꭱ)

Magnetic force is directly proportional to the magnetic field applied.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

Question number: 3

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

Assertion-Reason▾

Assertion (Ꭺ)

For a charged particle to pass through a uniform electro-magnetic field without change in velocity, its velocity vector must be perpendicular to the magnetic field.

Reason (Ꭱ)

Net Lorentz force on the particle is given by F=q[E+v×B]

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are false
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

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