» CBSE Physics Current Electricity Expected Questions : Unit II : CBSE Sample Question Papers

CBSE Physics Current Electricity Expected Questions : Unit II Filed under: Class XII Physics Expected Question Long Answer Type Questions Q. 1. Give an elementary description of current flow in a conductor and hence deduce a relation between current and drift velocity. Answer : Q. 2. (a) Establish the relation between current and drift velocity. (b) Deduce the expression for resitivity. © What is the effect of temperature on resistivity ? Answer : Q. 3. (a) Define a junction in a circuit and loop. (b) State and explain Kirchhoff’s law. Answer : Q. 4. Two cells of e.m.f. 1.5. V and 2.0 V and internal resistance IQ and 2 Q respectively are connected in parallel so as to send current in same direction through an external resistance of 5 Ω, (i) Draw the circuit diagram. (ii) Using Kirchhoffs laws calculate (a) Current through each branch of the circuit. (b) P.O. across the 5Q resistance. Answer : Q. 5. Determine the current drawn from a 12 V supply with internal resistance 0.5 Q by the following infinite network. Each resistor has 1 Ω resistance. Answer : Q. 6. With a certain cell, the balance point is obtained at 60 cm from the end of the potentiometer wire. With another cell whose e.m.f. differs from the first ceil by 0.1 volt, the balance point is obtained at 55 cm mark. Calculate e.m.f. of the cells. Answer : Pages: 1 2 3

Related CBSE Information

CBSE Physics Thermal and Chemical Effect Expected Questions for Quick Revision : Unit III

[Short and V/Short Answer Questions 1-2 marks] 1. State two factors on which temperature of inversion for a thermocouple depends. Answer 2. How is the electric conductivity of an electrolyte affected by increase in temperature ? Answer 3. Write the expression connecting the thermoelectric emf. of a thermocouple with temperature difference of its cold and hot junctions. Answer 4. Describe the term electrolysis. Give two factors which are responsible for lower electric conductivity of electrolytes than metals at room temperature. Answer 5. Current I flows through potential difference V across a conductor. What is the rate of production of

CBSE Physics Universe Expected Questions : Unit XIII

Short Answer Type Questions Q. 1. Name the nine plantes. Answer Q. 2. What is 1 AU ? Answer Q. 3. How were the crators caused on the surface of moon ? Answer Q. 4. What is albedo of a planet ? Answer Q. 5. State Hubble's law. Answer Q. 6. What is order of mass of Sun ? Answer Q. 7. What is Milky Way ? Answer Q. 8. How is brightness of star represented ? Answer Q. 9. What is the value of Solar Constant ? Answer Q. 10.

CBSE Physics Solids and Semi-Conductor Devices Expected Questions : Unit XII

Very Short Answer Type Questions Q. 1. Define semiconductor. Answer Q. 2. What is doping ? Answer Q. 3. Doping of silicon with indium leads to which type of semiconductor ? Answer Q. 4. What is n-type semiconductor ? Answer Q. 5. What is p-type semiconductor ? Answer Q. 6. Define Gate. Answer Q. 7. Which of crystalline or amporphous substance isotropic ? Answer Q. 8. Why transistor is so called 7 Answer Q. 9. What (11011)2 stand for? Answer Q. 10. How can you test in

CBSE Physics Atom, Nucleus, Nuclear Energy Expected Questions : Unit XI

Very Short Answer Type Questions Q. 1. Define isotopes. Answer Q. 2. Define isobars. strong>Answer Q. 3. What is atomic mass unit ? strong>Answer Q. 4. Define nuclear fission and fusion. strong>Answer Q. 5. Define Curie. strong>Answer Q. 6. Define half life period. strong>Answer Q. 7. What is approximately density of nucleus ? strong>Answer Q. 8. What is the ratio of gravitational, electric and nuclear interaction ? strong>Answer Q. 9. What is mass defect ? strong>Answer Q. 10. Deine radioactive decay constant. strong>Answer Q. 11. What is the relation between nuclear

CBSE Physics Thermal and Chemical Effect Expected Questions : Unit III

Very Short Answer Type Question Q. 1. What is a cell ? Answer : Q. 2. What are types of cells ? Answer : Q. 3. Define electric power and electric energy. Answer : Q. 4. What is a fuse wire ? What is its material ? Give the characteristics of the material used. Answer : Q. 5. Which has more resistance, a 100 W bulb or 200 W bulb ? Which draws more current ? Answer : Q. 6. One lamp glows brighter than the other. Which has more resistance ? Answer :