- What is Doppler's effect? Obtain an expression for the change in apparent frequency when an observer passes by a stationary source.
- State the laws of radioactivity and derive decay equation.
- What is green house effect?Discuss its effects, sources and the controlling measures.
- Discuss the phase relationship between the voltage and current in a.c. circuit containing capacitor and resistor in series and hence derive an expression for the impedance of the circuit.
- Why is a choke coil better than a resistor in an electrical appliances?
- What is meant by impedance of an a.c. circuit?
- What do you mean by curie?
- What is acid rain? Explain.
- What is global warming? Explain.
- What are ultrasonic and infrasonic?
- Which has a more direct influence on the loudness of a sound wave: the displacement amplitude or the pressure amplitude? Explain.
- Bats catch their prey in the dark even when they don't see the prey. How can this happen?
- A tuning fork has two prongs. why?
- State Hubble's law and write the significance of Hubble's constant.
- What are quarks? Write their names with charge they contained.
Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations.
Thursday 15 February 2018
Physics homework XII-18thFeb 2018-Sunday
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