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# AIIMS MBBS 2018 Higher Questions and Answers with Solutions Part 2

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Q: 10. In the diagram find out the current through :

Title: Q-10-Image of find out the Current Through

Description: Q-10-Image of find out the Current Through

Ans.

Solution:

Title: Q-10 - 1-Image of find out the Current Through

Description: Q-10 - 1-Image of find out the Current Through

Let so

So,

.

Q: 11. An transistor is connected in common emitter configuration in which collector supply is and the voltage drop across the load resistance of connected in the collector circuit is . If current amplification factor is , If the internal resistance of the transistor is , then which of the following options is incorrect.

Title: Q-11-The Diagram of Collector Circuit

Description: Q-11- The Diagram of Collector Circuit

Solution:

The circuit arrangement is shown in figure. Collector current,

Now

Current gain

Or

Q: 12. In a hydrogen spectrum third line of Ballmer՚s series having wavelength . Find the binding energy of the ground state.

Solution:

Q: 13. A wire of some length is bent in the form of a ring of diameter 2a having self-inductance L, then L will depend upon a as:

Solution:

Now,

So,

Q: 14. What will be the position of centre of mass of a half disc as shown:

Title: Q-11-The Image of Mass of Half Disc

Description: Q-11-The Image of Mass of Half Disc

(1)

(2)

(3)

(4)

Ans. (2)

Solution:

Fact that C. O. M. of hart disk is at distance of from canter

Q: 15. In a LCR series resonating circle circuit. Give the value of average power loss:

Solution:

Average power loss

Q: 16. Find the minimum wavelength of X-rays tube emitted by X-ray tube, which is operating at . Accelerating voltage.

Solution:

Q: 17. A galvanometer gives full scale deflection of volt when acting like a voltmeter when connected in series with resistance. The same galvanometer gives . Full scale deflection when acting like an ammeter when connected with shunt resistance of value in parallel. Find out the resistance of galvanometer.

Solution:

Title: Q-17-Find out the Resistance of Galvanometer

Description: Q-17-Find out the Resistance of Galvanometer

Title: Q-17-Find out the Resistance of Galvanometer

Description: Q-17-Find out the Resistance of Galvanometer

Q: 18. A uniformly charged non conducting disc with surface charge density having radius . Then find the value of electric field intensity at a point on the perpendicular bisector at a distance of .

Title: Q-18-Image of the Non-Conducting Disc

Description: Q-18- Image of the Non-Conducting Disc

Solution:

Q: 19. Two small balls, each having equal positive charge are suspended by two insulating strings of equal length L from a hook fixed to a stand. If mass of each & total angle between the two strings is , then find the charge on each ball.