MCQOPTIONS
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MCQOPTIONS
This section includes 132 Mcqs, each offering curated multiple-choice questions to sharpen your AIIMS MBBS knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Assertion : Magnetic field is useful in producing parallel beam of charged particle. Reason : Magnetic field inhibits the motion of charged particle moving across it. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of assertion. | |
| 102. |
Assertion : Lines of force are perpendicular to conductor surface. Reason : Generally electric field is perpendicular to equipotential surface. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false |
| D. | If both assertion and reason are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of assertion. | |
| 103. |
Assertion : When certain wavelength of light fall on metal surface it ejects electron. Reason : Light was wave nature |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» C. If assertion is true but reason is false. | |
| 104. |
Assertion : When a charge particle moves in a circular path. It produces electromagnetic wave. Reason : Charged particle has acceleration |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of assertion. | |
| 105. |
Assertion : The electromagnetic waves are transverse in nature. Reason : Waves of wavelength 10 μm are radiowave and microwave. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false |
| D. | If both assertion and reason are false. |
| Answer» D. If both assertion and reason are false. | |
| 106. |
Assertion : Unlike electric force and gravitational forces, nuclear force has limited range. Reason : Nuclear force do not obey inverse square law. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» C. If assertion is true but reason is false. | |
| 107. |
Assertion : Electron microscope has more resolving power than optical microscope. Reason : We can control the energy of electron. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» C. If assertion is true but reason is false. | |
| 108. |
Assertion : Heavy water is used as moderator in nuclear reactor. Reason : Water cool down the fast neutron. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» D. If both assertion and reason are false. | |
| 109. |
Assertion : In water, value of magnetic field decreases. Reason : Water is diamagnetic substance. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of assertion | |
| 110. |
Assertion : Generally heavy nuclei are unstable. Reason : It has more neutrons and protons. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» C. If assertion is true but reason is false. | |
| 111. |
Assertion : In YDSE bright and dark fringe are equally spaced. Reason : It only depends upon phase difference. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» D. If both assertion and reason are false. | |
| 112. |
Assertion : In an adiabatic process, change in internal energy of a gas is equal to work done on or by the gas in the process. Reason : Temperature of gas remains constant in an adiabatic process. |
| A. | If both assertion and reason are true and reason is the correct explanation of assertion |
| B. | If both assertion and reason are true but reason is not the correct explanation of assertion. |
| C. | If assertion is true but reason is false. |
| D. | If both assertion and reason are false. |
| Answer» D. If both assertion and reason are false. | |
| 113. |
On increasing the temperature of a conductor, its resistance increases because the |
| A. | relaxation time increases |
| B. | electron density decreases |
| C. | relaxation time decreases |
| D. | relaxation time remains constant |
| Answer» D. relaxation time remains constant | |
| 114. |
A transistor connected at common emitter mode contains load resistance of 5 kΩ. If the input peak voltage is 5 mV and the current gain is 50, find the voltage gain. |
| A. | 250 |
| B. | 500 |
| C. | 125 |
| D. | 50 |
| Answer» B. 500 | |
| 115. |
A zener diode is specified as having a break maximum power dissipation of 364 mV. What is the maximum current the diode can handle? |
| A. | 40 mA |
| B. | 60 mA |
| C. | 50 mA |
| D. | 45 mA |
| Answer» B. 60 mA | |
| 116. |
An atom of mass number 15 and atomic number 7 captures an α-particle and then emits a proton. The mass number and atomic number of the resulting atom will be respectively |
| A. | 14 and 2 |
| B. | 15 and 3 |
| C. | 16 and 4 |
| D. | 18 and 8 |
| Answer» E. | |
| 117. |
Which of the following has the longest de Broglie wavelength if they are moving with the same velocity? |
| A. | Neutron |
| B. | Proton |
| C. | α particle |
| D. | β-particle |
| Answer» E. | |
| 118. |
The intensity ratio of the maxima and minima in an interference pattern produced by two coherent sources of light is 9 : 1. The intensities of the used light sources are in ratio |
| A. | 3 : 1 |
| B. | 4 : 1 |
| C. | 9 : 1 |
| D. | 10 : 1 |
| Answer» C. 9 : 1 | |
| 119. |
A series resonant LCR circuit has a quality factor (Q-factor) 0.4. If R = 2 kΩ, C = 0.01 μF, then the value of inductance is |
| A. | 0.1 H |
| B. | 0.064 H |
| C. | 2 H |
| D. | 5 H |
| Answer» C. 2 H | |
| 120. |
Focal length of objective and eye piece of telescope are 200 cm and 4 cm respectively. What is the length of telescope for normal adjustment? |
| A. | 196 cm |
| B. | 204 cm |
| C. | 250 cm |
| D. | 225 cm |
| Answer» C. 250 cm | |
| 121. |
The angle of dip at a certain place where the horizontal and vertical components of the earth’s magnetic field are equal is |
| A. | 30° |
| B. | 75° |
| C. | 60° |
| D. | 45° |
| Answer» E. | |
| 122. |
A steady current flows in a metallic conductor of non-uniform cross-section. Which of these quantities is constant along the conductor? |
| A. | Electric field |
| B. | Drift velocity |
| C. | Current |
| D. | Current density |
| Answer» D. Current density | |
| 123. |
If the linear momentum is increased b 50%, then kinetic energy will increase by |
| A. | 50% |
| B. | 100% |
| C. | 125% |
| D. | 25% |
| Answer» D. 25% | |
| 124. |
A ball is dropped from the top of a building 100 m high. At the same instant another ball is thrown upwards with a velocity of 40 m/s from the bottom of the building. The two balls will meet after |
| A. | 3 s |
| B. | 2 s |
| C. | 2.5 s |
| D. | 5 s |
| Answer» D. 5 s | |
| 125. |
A transparent cube of 15 cm edge contains a small air bubble. Its apparent depth when viewed through one face is 6 cm and when viewed through opposite face is 4 cm. The refractive index of material of cube is |
| A. | 2.0 |
| B. | 1.5 |
| C. | 1.6 |
| D. | 2.5 |
| Answer» C. 1.6 | |
| 126. |
A gun of mass 10 kg fires 4 bullets per second. The mass of each bullet is 20 g and the velocity of the bullet when it leaves the gun is 300 m s−1. The force required to hold the gun when firing is |
| A. | 6 N |
| B. | 8 N |
| C. | 24 N |
| D. | 240 N |
| Answer» D. 240 N | |
| 127. |
Two charged spheres separated by a distance ‘d’ exert some force on each other. If they are immersed in a liquid of dielectric constant 2, then what is the force exerted, if all other conditions are same? |
| A. | F/2 |
| B. | F |
| C. | 2F |
| D. | 4F |
| Answer» B. F | |
| 128. |
Tend identical cells each of potential E and internal resistance r are connected in series to form a closed circuit. An ideal voltmeter connected across three cells, will read |
| A. | 10E |
| B. | 3E |
| C. | 13E |
| D. | 7E |
| Answer» C. 13E | |
| 129. |
Time period of pendulum, on a satellite orbiting the earth, is |
| A. | 1/π |
| B. | zero |
| C. | π |
| D. | infinity |
| Answer» E. | |
| 130. |
The temperature of a body is increased from −73℃ to 327℃. Then the ratio of emissive power is |
| A. | 1/9 |
| B. | 1/27 |
| C. | 27 |
| D. | 81 |
| Answer» E. | |
| 131. |
Light wave enters from medium 1 to medium 2. Its velocity in 2nd medium is double from 1st. For total internal reflection the angle of incidence must be greater than |
| A. | 30° |
| B. | 60° |
| C. | 45° |
| D. | 90° |
| Answer» B. 60° | |
| 132. |
A voltmeter of resistance 20000 Ω reads 5 volt. To make it read 20 volt, the extra resistance required is |
| A. | 40000 Ω in parallel |
| B. | 60000 Ω in parallel |
| C. | 60000 Ω in series |
| D. | 40000 Ω in series |
| Answer» D. 40000 Ω in series | |