COMEDK UGET 2009 paper solved for Medical Engineering And Dental

1. A simple pendulum has a period T inside a lift when it is stationary. The lift is accelerated upwards with constant acceleration 'a'. The period ?

[A] decreases

[B] increases

[C] remains same

[D] becomes infinite

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2. 90 dB sound is 'x' times more intense than 40 dB sound, then x is

[A] 5

[B] 50

[C] 10⁵

[D] 500

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3.

A star is moving from the earth with speed V. Change in wavelength (dλ) observed on Earth is

[A] λV/C

[B] λV/(C+V)

[C] λC/(C+V)

[D] λC/V

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4. An open pipe emits fundamental frequency n₀ when it emits 3rd harmonic, the pipe can accommodate

[A] 2 nodes 2 antinodes

[B] 3 nodes 4 antinodes

[C] 3 nodes 3 antinodes

[D] 1 node 2 antinodes

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5.

In an adiabatic process

[A] temperature remains constant

[B] pressure remains constant

[C] volume remains constant

[D] there is no transfer of heat

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6. carnot's heat engine takes 300J of heat from a source at 627^oC and gives some part of it to sink at 27^oC. Work done by engine in one cycle is

[A] 200J

[B] 300J

[C] 150J

[D] 120J

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7. 15/16^th of a radioactive sample disintegrates in 2 hrs. Mean life of radioactive sample is approximately,

[A] 30min

[B] 43min

[C] 21min

[D] 15min

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8. Clear images of soft tissues can be well studied using

[A] MRI

[B] X-rays

[C] Ultrasonic

[D] I.R rays

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9.

Particles which are note composite and hence truly elementary are

[A] mesons

[B] protons

[C] neutrons

[D] leptons

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10. A logic gate whose output will be logic 0 state only when all inputs are in logic 1 state is called

[A] AND

[B] OR

[C] NOR

[D] NAND

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COMEDK UGET 2009 paper solved for Medical Engineering And Dental

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