what is a transistor? what are these types?

What is a rainbow ? What is its two types ? How are they formed ? Discuss briefly.

What is an inflorescence ? What are the two main types of inflorescence ?

What is Ringworm? What are the different types of ringworm.

What are the general characteristics of nonvascular plants, and what are the three main types ?

Draw a circuit diagram of n-p transistor amplifier in CE configuration. Under what condition does the transistor acts as an amplifier?

What is beta value for transistor whose alpha=0.98 ?

The ac current gain of a transistor is 120. What is the change in the collector current in the transistor whose base current changes by 100 muA ?

What is the immune system? What are its main kinds? What is the role of B-type and T-type cells in the body's defensive mechanism?

What is an allergy? Name the types of allergens.

What are two types of auxin?