CBSE India | CBSE AIEEE Sample Papers | CBSE Class X | CBSE Class XII | CBSE Results | CBSE Syllabus | CBSE Sample Papers | CBSE Datesheet | CBSE Exams | CBSE Schools in India | CBSE Guess Papers | CBSE PMT

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

CBSE Physics Current Electricity Expected Questions for Quick Revision : Unit II

Filed under:

1-2 Marks Very Short/Short Answer Questions

1. Of metals and alloys, which has greater value of temperature coefficient of resistance?
Answer

2. Manganin is used for making standard resistances. Why?
Answer

3. A wire of resistivity p is stretched to double its length, what will be the new resistivity?
Answer

4. Draw a circuit diagram of a metre bridge arrangement to determine an unknown resistance. Explain the principle of the experiment and give the formula used.
Answer

5. How much current will an electric heater rated at 1 kW draw when connected to a 220 V supply?
Answer

6. How much current will an air-conditioner rated at 2-5 &W, draw when connected to a 220 V supply?
Answer

7. State Ohm’s law. Show that the resistance of a conductor depends upon its shape.
Answer

8. How much is the current flowing through a heater rated at 3 kW when connected to a 100 V d.c. supply?
Answer

9. A voltage of 30 V is applied across a colour coded carbon resistor with first, second and third rings of blue, black and yellow colours. What is the current flowing through resistor?
Answer

10. A voltage of 5 V is applied across a colour code carbon resistor in the first, second and third rings of brown, black and red colours. What is the current flowing through resistor?
Answer

11. A carbon resistor of 47 kΩ is to be marked with rings of different colours for identification. What is the sequence of colours?
Answer

12. Write two special characteristics of manganin due to which it is used in making standard resistances.
Answer

13. The V-I graphs for parallel and series combination of two metallic resistors are as shown in the figure. Which graph represents parallel combination? Justify your answer.
3
Answer

14. On a given resistor, the colour bands are in the sequence green, violet and red. What is the resistance ?
Answer

15. There are two conductors A and B of the same material having lengths / and 2l; radii r and r/2 respectively. What is the ratio of their resistances?
Answer

16. State one main difference between primary and secondary cell.
Answer

17. The sequence of bands on a carbon resistor are yellow, red, orange and silver. What is (i) its resistance, (ii) tolerance?
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 Magnetic Effects of Current Expected Questions for Quick Revision : Unit IV

Short/V. Short Answer Questions 1-2 Marks Each 1. A current is set up in a long copper pipe. Is there a magnetic field (i) inside ; (ii) outside the pipe ? Answer 2. Consider the circuit shown where APB and AQB are semicircles. What will be the mag¬netic field at the centre C of a circular loop ? Answer 3. Under what conditions the force acting on a charge moving through a uniform magnetic field., minimum ? Answer 4. What will be the path of a charged particle moving along the direction of a uniform magnetic field? Answer 5. An

CBSE Physics Electrostatics Expected Questions for Quick Revision : Unit I

Short/V. Short Questions i.e. 1-2 Marks Questions 1. Name two basic properties of electric charge. Answer : 2. The electric potential at 0 - 9 m from a point charge is + 50 V. Find the magnitude and nature of the charge. Answer : 3. Small ozone layer on the top of atmosphere is crucial for human survival. Why ? Answer : 4. Sketch lines of force due to point charges (i) q < 0 ; (ii) q > 0. Answer : 5. Define dielectric constant in terms of capacitance of a

CBSE Physics Current Electricity Expected Questions : Unit II

Very Short Answer Type Question Q. 1. What is unit of charge ? Answer : Q. 2. What are units of potential and current ? Answer : Q. 3. A heavy current is passed through a wire, is it charged ? Answer : Q. 4. What is unit of resistance ? Define it. Answer : Q. 5. What are the factors upon which resistance of a conductor depends ? Answer : Q. 6. What is specific resistance, resistivity of a wire ? Is it more for thick or thin wire ? Answer :

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.

Sitemap