AIIMS Physics: Questions 28 - 31 of 500

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Question number: 28

» Magnetic Effects of Current and Magnetism » Current Loop as Magnetic Dipole

Appeared in Year: 2006

MCQ▾

Question

Circular loop of a wire and a long straight wire carry currents IC and Ie, respectively as shown in figure. Assuming that these are placed in the same plane, the magnetic fields will be zero at the centre of the loop when the separation H is – [AIIMS]

A circular loop of a wire and a long straight wire

A Circular Loop of a Wire and a Long Straight Wire

In figure a circular loops of a wire and a long straight wire carry current IC and i.e., respectively are shown.

Choices

Choice (4) Response

a.

IeRICπ

b.

πIcIeR

c.

ICRIeπ

d.

IeπICR

Question number: 29

» Magnetic Effects of Current and Magnetism » Electromagnets and Permanent Magnets

Appeared in Year: 1999

MCQ▾

Question

A charged particle enters a magnetic field B with its initial velocity making an angle of 45° with B. The path of the particle will be: [AIIMS]

Choices

Choice (4) Response

a.

A helix

b.

An ellipse

c.

A circle

d.

A straight line

Question number: 30

» Electrostatics » Capacitors

Appeared in Year: 2002

MCQ▾

Question

In the given figure, the capacitors C1, C3, C4, C5

A circuit of combination of 5 capacitors

A Circuit of Combination of 5 Capacitors

In figure a circuit diagram of combination of 5 capacitors is shown.

have a capacitance 4µF each. If the capacitor C2 has a capacitance 10µF, then effective capacitance between A and B will be: [AIIMS]

Choices

Choice (4) Response

a.

8µF

b.

6µF

c.

2µF

d.

4µF

Question number: 31

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2004

MCQ▾

Question

A photon of energy 4 eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be applied for stopping the emission of electrons is – [AIIMS]

Choices

Choice (4) Response

a.

6V

b.

4V

c.

8V

d.

2V

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