HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Physics

Write a general notation of the nucleus of element X. What each term denotes?

What is isotope? Give an example.

What is isotone? Give an example.

What is isobar? Give an example.

Define atomic mass unit u.

What is binding energy of a nucleus? Give its expression.

Calculate the energy equivalent of 1 atomic mass unit.

Give the physical meaning of binding energy per nucleon.

Explain the variation of average binding energy with the mass number using a graph and discuss about its features.

Calculate the mass defect and the binding energy per nucleon of the \[\ce{^108_47Ag}\] nucleus. [atomic mass of Ag = 107.905949].

Show that the mass of radium \[\ce{^226_88Ra}\] with an activity of 1 curie is almost a gram. Given T1/2 = 1600 years.

The principle based on which a solar cell operates is ____________.

The light emitted in an LED is due to

The output of the following circuit is 1 when the input ABC is

Give the Barkhausen conditions for sustained oscillations.

Explain the current flow in an NPN transistor.

Explain the need for a feedback circuit in a transistor oscillator.

What is rectification?

Sketch the static characteristics of a common emitter transistor and bring out the essential features of input and output characteristics.

Transistor functions as a switch. Explain.