HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Define self-inductance.

Explain step up and step down transformer?

The primary of a transformer has 40 turns and works on 100 V and 100 W. Find a number of turns in the secondary to step up the voltage to 400 V. Also calculate the current in the secondary and primary.

Using Ampere's law, obtain an expression for the magnetic induction near a current-carrying straight infinitely long wire. 

Describe the construction and working of a transformer with a neat labelled diagram.

A radio can tune over the frequency range of a portion of the MW broadcast band (800kHz -1200kHz). If its LC circuit has an effective inductance of 200mH, what must be the range of its variable condenser? 

State any two advantages and disadvantages of a photodiode. 

Draw the circuit symbol for NPN and PNP transistors. What is the difference in the Emitter, Base, and Collector regions of a transistor? 

State the law of radioactive decay.

With the help of a neat circuit diagram, explain the working of a photodiode. 

With the help of neat labelled circuit diagram explain the working of half wave rectifier using semiconductor diode. Draw the input and output waveforms.

What are the disadvantages of group tests of intelligence?

Explain the Big Five-Factor Model of personality (OCEAN).

Explain the following concept in 25 to 30 words:

Psychological resilience

Write differences.

Rural Community and Urban Community

Write differences.

Caste and Class

Differentiate between:

Language diversity and Regional diversity.

Answer the following question in detail. (About 150 words)

‘The World Wide Web is a source of information and misinformation.’ Discuss this statement with regard to the impact of the internet on:

1. Parents
2. Children
3. School

Write short note.

Characteristics of modernisation

State whether the following statement is True or False with reason.

Modern industry is based on profit making.