CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS

CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS


CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS
Q 1 Define electric current ?
Q 2 Give mathematical formula of electric current.
Q 3 What is S I unit of electric current?
Q 4 Define one ampere of current?
Q 5 Name the device used to measure electric current in a circuit.
Q 6 How ammeter is connected in an electric circuit?
Q 7 What is the ideal value of resistance of an ammeter?
Q 8 Define electric circuit?
Q 9 Draw an electric circuit using the component's an electric bulb, battery , resistance, ammeter , voltmeter , key and connecting wires.
Q 10 What is the direction of flow of current in an electric circuit?
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS
Q 11 Define electric charge ? Give its S I units.
Q 12 Define electric field ? Give its S I unit.
Q 13 What is electric potential ? Give its S I unit.
Q 14 Define 1 Volt of electric potential?
Q 15 Define electric potential difference?
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS
Q 16 Define 1 volt of electric potential difference?
Q 17 Name the device which is used to maintain the potential difference across the circuit.
Q 18 State Ohm's Law.
Q 19 If potential difference of 12 V is applied across a conductor and a current of 20 mA following through the conductor , find the resistance of the conductor.( Hint: 1 m A = 10-3A)
Q 20 Find the value of current in circuit if 6 ohm resistor used with 12 V battery.

CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS

 Q 21 Find the resistance of a conductor in which 1 mA current passes, when potential difference across the ends of the conductor is 1 volt.
Q 22 Out of  A and B which has more resistance:

Q 23 What do you mean resistance? Give its S I units.
Q 24 Define 1 Ohm?
Q 25 Draw the graph for Ohmic and Non-Ohmic materials.
Q 26 What happens to the resistance of a circuit if the current through it is doubled?
Q 27 On what factors does the resistance of a conductor depends?
Q 28 Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source ? Why?CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS
Q 29 Why are the coils of electric toasters and electric irons made of alloy rather than pure metal?  
Q 30 The resistance of a conductor kept constant and potential difference across the conductor reduced to half of its former value. What change will occur in the current through it.
Q 31 Why is tungsten used almost exclusively for the filament of electric bulbs ? 
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS
Q 32 A wire of length 2 m , diameter 1 mm has 50 m Ω resistance. Calculate resistivity of the material of the wire.
(Ans Resistivity = 1.963 x 10-8Ω m).
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS 
Q 33 The resistivity of the material of the wire is 4 x 10-5 Ω cm. If the resistance of the wire is 14 ohm and its diameter is 1 mm, calculate the length of the wire.
( Ans Length = 27.5 m).
Q 34 How does use of fuse wire protect electric circuits/appliances?  
Q 35 n resistor each of resistance R first connected in series and then in parallel. What is the ratio of n resistors in series combination to parallel combination ?
Q 36 Ammeter burns out when connected in parallel. Give reasons.
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS 
Q 37 Two wires of equal area of cross-section , one of copper and other of manganin have same resistance. Which one will be longer?
Q 38 What happens to the resistance of a circuit if the current through it is doubled?
Q 39  Which wire should use for electric iron copper , silver or nichrome wire? Give reason.
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS 
Q 40 Two resistor of resistance R and 2 R are connected in parallel in an electric circuit. Calculate the ratio of the electric power consumed by R and 2 R ?
Q 41 A wire of resistance R is bent in form of closed circle, what is resistance across a diameter of the circle ?
Q 42 Why are copper wires used as connecting wire?
CBSE CLASS X CHAPTER 12 ELECTRICITY EXTRA QUESTIONS 

Comments

Post a Comment

Popular posts from this blog

CLASS 12TH PHYSICS EXPERIMENT To find the value of v for different values of u in case of a concave mirror and to find the focal length.

Image
To find the value of v for different values of u in case of a concave mirror and to find the focal length. Apparatus : Optical bench,concave mirror, optical needle,a meter scale. Theory: By Mirror formula , 1/f=1/v+1/u, f=uv/(u+v), where, u = distance of object from the pole of mirror v =  distance of image from the pole of mirror    f = focal length of concave mirror Ray diagram of concave mirror Procedure:  1 Take given concave mirror and turn its reflecting surface toward a distant object to obtain image on a sheet of note book. 2 Measure the distance between mirror and image formed on the sheet. This is the rough focal length of concave mirror. 3 Clamp mirror holder in one upright and fix two optical needles in two uprights on the optical bench. Place them close to each other at one end of optical bench. Adjust their heights so that tips of the needles are at the same height as the center of the mirror. Pierce a small piece of paper into the tip of the n
Read more

CBSE CLASS X SCIENCE CHAPTER ELECTRICITY LESSON PLAN 1

Image
CBSE CLASS X SCIENCE LESSON PLAN LESSON PLAN 1 CHAPTER 12 ELECTRICITY CBSE CLASS X SCIENCE e-LESSON PLAN CHAPTER ELECTRICITY BOARD: CBSE CLASS: 10TH (X) SUBJECT: SCIENCE THEME: PHYSICS ( HOW THINGS WORK) UNIT : EFFECTS OF CURRENT CHAPTER: ELECTRICITY TOPIC : ELECTRIC CURRENT AND CIRCUITS PRE-REQUISITE KNOWLEDGE: Metal and Non-metal, concept of conductor and insulators, Structure of atom, concept of electrons, methods of charging etc. CBSE CLASS X SCIENCE LESSON PLAN CHAPTER ELECTRICITY TEACHING AIDS:  In addition to general teaching tools like Green Board, chalk, duster, white board, marker of different color, smart class, etc the teacher will use Electric devices like Ammeter, Voltmeter, Electric cell, battery , wire , plug key, etc. The References used will be:  Text book NCERT Science class X University Physics etc. METHODOLOGY (PEDAGOGY): Demonstration cum lecture method. Activity based teaching in which active participation of
Read more

Branches of Science

Image
Science is broadly classified into two categories:  Natural Sciences or Real Science                                        Social Science Natural Science is the branch of science which deals with the study of universe (living organisms and non living systems) each and every thing.The law and theories in natural science does not change with place,people and time.So, its a study of  unchanged reality. Example : If an experiment is performed(correctly and accurately) by me or you its result does not change. Social Science is the systematic study of human behaviour and society. It is changing reality. Example: Economy of different countries is different. Initially, Science is studied under Philosophy .  But with the passage of time, as the man acquired more knowledge and experiment to validate facts(philosophy) science is considered as separate subject. In universe subject matter of Natural Science (Real Science) is studied  under two categories Living Organism and
Read more