Category Archive: Revision Tests

Dec 02


1. Draw a circuit diagram of OR gate.

2. What is a logic gate?

3. What types of charge-carriers are there in a n-type semi conductor?

4. Give the logical symbol of an AND gate. Mark the inputs and outputs.

5. Draw the logic symbol for a NAND gate.

6. Which biasing will make the resistance of p-n junction high?

7. Write the truth table for OR gate.

8. What is the change in the collector current, in a transistor of a.c. current gain 150, for a 100µA change in its base current?

9. When the voltage drop across a p-n junction diode is increased from 0.65V to 0.70V, the change in the diode current is 5mA. What is the dynamic resistance of the diode?

10. How does conductivity of a semiconductor change with rise in its temperature?

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Dec 02

Class 12 Physics : Electrostatics Revision Test

Max marks:50 Time:2hrs

A glass rod rubbed with silk acquires a charge of 6×10-12 C. Calculate the number of electrons it has gained

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Mar 08

Class XI Physics Chapter wise Revision Test – Gravitation and Waves





Questions 1 to 5 carries one mark each

Questions 5 to 10 carries 2 marks each

Questions 10 to 15 carries 3 marks each

Questions 16

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Mar 08

Class XI Physics Revision Tests – Thermodynamics



Max marks 35

Time 1 ½ hrs

Questions 1 to 5: 1 mark  each

Questions 6 to 10: 2 marks each

Questions 11 to 15: 3 marks each

Question 16: 5 marks

  1. What is an isochoric process?
  2. On what factors does the efficiency of a Carnot engine depend?
  3. State second law of thermodynamics. (Any one statement)
  4. State zeroth law of thermodynamics.
  5. What is a heat engine?
  6. State first law of thermodynamics and apply it to an isothermal process.
  7. Explain why a balloon is cooler after it bursts.
  8. What is a PV diagram? What does the area between the PV curve and the volume axis signify?
  9. State the conditions for two bodies to be in thermal equilibrium.
  10. State Carnot’s theorem and explain its significance.
  11. What is a cyclic process? Show that the work done in a cyclic process is equal to the area enclosed by the loop representing the cyclic process.
  12. Why gases have two principal specific heat capacities? Define them
  13. Why C > Cv? Prove that C – Cv = R
  14. Define the coefficient of performance of a heat pump. (refrigerator) and obtain a relation for it in terms of temperature T1 and T2
  15. A sample of gas (γ = 1.5) is compressed adiabatically from a volume of 1600 cm3 to 400 cm3.  If the initial pressure is 150 kPa, what is the final pressure and how much work is done on the gas in the process?
  16. Explain the construction and various operations involved in a Carnot’s heat engine with neat labeled diagram. Draw Carnot’s cycle and write expression for efficiency of a Carnot’s heat engine.


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