# Balbharati solutions for Physics 11th Standard Maharashtra State Board chapter 14 - Semiconductors [Latest edition]

#### Chapters ## Chapter 14: Semiconductors

ExercisesExercise
Exercises, Exercise [Page 256]

### Balbharati solutions for Physics 11th Standard Maharashtra State Board Chapter 14 Semiconductors Exercises, Exercise [Page 256]

Exercises | Q 1. (i) | Page 256

Choose the correct option.

Electric conduction through a semiconductor is due to:

• Electrons

• holes

• none of these

• both electrons and holes

Exercises | Q 1. (ii) | Page 256

Choose the correct option.

The energy levels of holes are:

• in the valence band

• in the conduction band

• in the bandgap but close to valence band

• in the bandgap but close to conduction band

Exercises | Q 1. (iii) | Page 256

Choose the correct option.

Current through a reverse-biased p-n junction increases abruptly at:

• Breakdown voltage

• 0.0 V

• 0.3V

• 0.7V

Exercises | Q 1. (iv) | Page 256

Choose the correct option.

A reverse-biased diode is equivalent to:

• an off switch

• an on switch

• a low resistance

• none of the above

Exercises | Q 1. (v) | Page 256

Choose the correct option.

The potential barrier in p-n diode is due to:

• depletion of positive charges near the junction

• accumulation of positive charges near the junction

• depletion of negative charges near the junction

• accumulation of positive and negative charges near the junction

Exercises | Q 2. (i) | Page 256

What is the importance of the energy gap in a semiconductor?

Exercises | Q 2. (ii) | Page 256

Which element would you use as an impurity to make germanium an n-type semiconductor?

Exercises | Q 2. (iii) | Page 256

What causes a larger current through a p-n junction diode when forward biased?

Exercises | Q 2. (iv) | Page 256

On which factors does the electrical conductivity of a pure semiconductor depend at a given temperature?

Exercise | Q 2. (v) | Page 256

Why is the conductivity of a n-type semiconductor greater than that of p-type semiconductors even when both of these have the same level of doping?

Exercises | Q 3. (i) | Page 256

Explain how solids are classified on the basis of the band theory of solids.

Exercises | Q 3. (ii) | Page 256

Distinguish between intrinsic semiconductors and extrinsic semiconductors.

Exercises | Q 3. (iii) | Page 256

Explain the importance of the depletion region in a p-n junction diode.

Exercises | Q 3. (iv) | Page 256

Explain the I-V characteristic of a forward-biased junction diode.

Exercises | Q 3. (v) | Page 256

Discuss the effect of external voltage on the width of depletion region of a p-n junction.

## Chapter 14: Semiconductors

ExercisesExercise ## Balbharati solutions for Physics 11th Standard Maharashtra State Board chapter 14 - Semiconductors

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Concepts covered in Physics 11th Standard Maharashtra State Board chapter 14 Semiconductors are Introduction to Semiconductors, Electrical Conduction in Solids, Band Theory of Solids, Intrinsic Semiconductor, A p-n Junction Diode, Semiconductor Devices, Applications of Semiconductors and P-n Junction Diode, Thermistor, Extrinsic Semiconductor, p-n Junction.

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