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AIIMS (All India Institute of Medical Sciences) Physics: Questions 31 - 34 of 500
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Question 31
Appeared in Year: 2004
Question MCQ▾
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. | 8V | |
b. | 4V | |
c. | 2V | |
d. | 6V |
Question 32
Appeared in Year: 2003
Question MCQ▾
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. | Ferromagnetic | |
c. | Diamagnetic | |
d. | Paramagnetic |
Question 33
Appeared in Year: 1998
Question MCQ▾
Mirage is a phenomenon due to [AIIMS; MP PET 2002; AFMC 2003]
Choices
Choice (4) | Response | |
---|---|---|
a. | Refraction of light | |
b. | Total internal reflection of light | |
c. | Reflection of light | |
d. | Diffraction of light |
Question 34
Appeared in Year: 2005
Question MCQ▾
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]
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |