AIPMT 2011 Mains | Moving Charges and Magnetism Question 45 | Physics

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency $$f$$ Hz. The magnitude of magnetic induction at the center of the ring is

$${{{\mu _0}qf} \over {2\pi R}}$$

$${{{\mu _0}qf} \over {2R}}$$

$${{{\mu _0}q} \over {2fR}}$$

$${{{\mu _0}q} \over {2\pi fR}}$$

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

A current carrying closed loop in the form of a right angle isosceles triangle ABC is placed in uniform magnetic field acting along AB. If the magnetic force on the arm BC is $$\overrightarrow {F,} $$ the force on the arm AC is

AIPMT 2011 Prelims Physics - Moving Charges and Magnetism Question 58 English

AIPMT 2011 Prelims Physics - Moving Charges and Magnetism Question 58 English

$$ - \sqrt 2 \,\overrightarrow F $$

$$-$$ $$\,\overrightarrow F $$

$$\,\overrightarrow F $$

$$\sqrt 2 \,\overrightarrow F $$

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron

will turn towards right of direction of motion

speed will decrease

speed will increase

will turn towards left of direction of motion

AIPMT 2010 Mains

MCQ (Single Correct Answer)

-1

A current loop consists of two identical semicircular parts each of radius R, one lying in the x-y plane and the other in x-z plane. If the current in the loop is $$i$$. The resultant magnetic field due to the two semicircular parts at their common centre is

$${{{\mu _0}i} \over {2\sqrt 2 R}}$$

$${{{\mu _0}i} \over {2R}}$$

$${{{\mu _0}i} \over {4R}}$$

$${{{\mu _0}i} \over {\sqrt 2 R}}$$

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