AIIMS (All India Institute of Medical Sciences) Physics: Questions 31 - 34 of 500

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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

Question number: 32

» Magnetic Effects of Current and Magnetism » Para, Dia and Ferro-Magnetic Substances

Appeared in Year: 2003

MCQ▾

Question

A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as – [AIIMS]

Choices

Choice (4) Response

a.

Antiferromagnetic

b.

Paramagnetic

c.

Ferromagnetic

d.

Diamagnetic

Question number: 33

» Ray Optics » Total Internal Reflection

Appeared in Year: 1998

MCQ▾

Question

Mirage’ is a phenomenon due to [AIIMS; MP PET 2002; AFMC 2003]

Choices

Choice (4) Response

a.

Total internal reflection of light

b.

Refraction of light

c.

Reflection of light

d.

Diffraction of light

Question number: 34

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 2005

MCQ▾

Question

A magnet is made to oscillate with a particular frequency, passing through a coil as shown in figure. The time variation of the magnitude of emf generated across the coil during one cycle is – [AIIMS]

A magnet oscillate through a coil

A Magnet Oscillate Through a Coil

In figure a magnet is made to oscillate with a particular frequency, passing through a coil.

Choices

Choice (4) Response

a.

Graph of emf verses time (Choice-A)

Graph of Emf Verses Time (Choice-A)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

b.

Graph of emf verses time (Choice-B)

Graph of Emf Verses Time (Choice-B)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

c.

Graph of emf verses time (Choice-C)

Graph of Emf Verses Time (Choice-C)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

d.

 Graph of emf verses time (Choice-D)

Graph of Emf Verses Time (Choice-D)

Figure shows the time variation of the magnitude of emf generated across the coil during one cycle.

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