{"id":1747,"date":"2020-08-18T07:08:03","date_gmt":"2020-08-18T07:08:03","guid":{"rendered":"https:\/\/murreeroad.org\/physics10\/?p=1747"},"modified":"2020-10-18T23:14:35","modified_gmt":"2020-10-18T18:14:35","slug":"electrostatics","status":"publish","type":"post","link":"https:\/\/murreeroad.org\/physics10\/electrostatics\/","title":{"rendered":"Electrostatics"},"content":{"rendered":"
Q.1 Define charge.\u00a0<\/a><\/strong><\/p>\n Q.2 What is Electrostatic Induction?<\/a><\/strong><\/p>\n Q.3 What is function of Electroscope?\u00a0<\/a><\/strong><\/p>\n Q.4 What is gold leaf electroscope?<\/a><\/strong><\/p>\n Q.5 What is the numerical value of ‘k’ in Coulomb’s law?<\/a><\/strong><\/p>\n Q.6 What is meant by point charge?\u00a0<\/a><\/strong><\/p>\n Q.7 Define electric field intensity. Write its SI unit.<\/a><\/strong><\/p>\n Q.8 Define Electric Field.\u00a0<\/a><\/strong><\/p>\n Q.9 What is mean by Electric Field Line? What is its direction?<\/a><\/strong><\/p>\n Q.10 Describe two properties of Electric Field Lines.\u00a0<\/a><\/strong><\/p>\n Q.11 Define electric field lines and electric potential.\u00a0<\/a><\/strong><\/p>\n Q.12 Define Electric Potential and give its mathematical equation.<\/a><\/strong><\/p>\n Q.13 In which direction will positively charged particle move in an electric field?\u00a0<\/a><\/strong><\/p>\n Q.14 Define Capacitor and write its formula.<\/a><\/strong><\/p>\n Q.15 In which form a capacitor stores energy?\u00a0<\/a><\/strong><\/p>\n Q.16 What is Dielectric in capacitor?\u00a0<\/a><\/strong><\/p>\n Q.17 Define Capacitance and state its SI unit.<\/a><\/strong><\/p>\n Q.18 What is Electrolyte?\u00a0<\/a><\/strong><\/p>\n Q.19 What is meant by Filter circuit?<\/a><\/strong><\/p>\n Q.20 What is the effect of increasing area of capacitors plates on the charge storing capacity of capacitors?\u00a0<\/a><\/strong><\/p>\n Q.21 Describe any two characteristics of series combination of capacitors.<\/a><\/strong><\/p>\n Q.22 Why Electric bulb and Electric heater are not connected in series?\u00a0<\/a><\/strong><\/p>\n Q.23 Write the names of two types of capacitors and give one example on it.<\/a><\/strong><\/p>\n Q.24 What is used as dielectric in paper Capacitors?<\/a><\/strong><\/p>\n Q.25 Write two uses of capacitor.<\/a><\/strong><\/p>\n Q.26 What are the hazards of static electricity?<\/a><\/strong><\/p>\n Q.27 What is cause of lightening?\u00a0<\/a><\/strong><\/p>\n Q.28 Write the characteristics of charges.<\/a><\/strong><\/p>\n Q.29 How charge is produced? Give an example.<\/a><\/strong><\/p>\n Q.30 Describe the method of charging bodies by Electrostatic induction.<\/a><\/strong><\/p>\n Q.31 How we can detect the type of charge by the use of electroscope?\u00a0<\/a><\/strong><\/p>\n Q.32 Define electric lines of force.\u00a0<\/a><\/strong><\/p>\n Q.33 In what direction will the positive charge move in an electric field? <\/a><\/strong><\/p>\n Q.34 What is difference between Electric Field and Electric Intensity?<\/a><\/strong><\/p>\n Q.35 Electric Intensity is a vector quantity. Why?\u00a0<\/a><\/strong><\/p>\n Q.36 Draw the electric field lines of a negative charge.\u00a0<\/a><\/strong><\/p>\n Q.37 Define the unit of electric field intensity.\u00a0<\/a><\/strong><\/p>\n Q.38 What is the relation between Electric Potential and Potential Energy? <\/a><\/strong><\/p>\n Q.39 Describe the construction of capacitor.\u00a0<\/a><\/strong><\/p>\n Q.40 How a capacitor stores a charge? Explain.\u00a0<\/a><\/strong><\/p>\n Q.41 What is the difference between capacitor and dielectric?<\/a><\/strong><\/p>\n Q.42 What is SI unit\/unit of capacitance? Define.<\/a><\/strong><\/p>\n Q.43 How many methods are there of combination of capacitors?<\/a><\/strong><\/p>\n Q.44 On which factors does the ability of a Capacitor to store charge depends?<\/a><\/strong><\/p>\n Q.45 Define fixed capacitor. Also give an example.<\/a><\/strong><\/p>\n Q. 46 What do you know about Electrolytic Capacitors?\u00a0<\/a><\/strong><\/p>\n Q.47 Define mica capacitors and paper capacitors.\u00a0<\/a><\/strong><\/p>\n Q.48 Write down a brief note on application of electrostatics in spry painting.\u00a0<\/a><\/strong><\/p>\n Q.49 Write a brief note on electrostatic air cleaners.<\/a><\/strong><\/p>\n Q.50 Describe two uses of electrostatics.<\/a> <\/a><\/strong><\/p>\n Q.1 Define charge. <\/strong><\/p>\n Ans: Charge is a basic property of a material body due to which attracts or repels another object.<\/p>\n Charges are two types i.e. (i) Negative (ii) Positive <\/a><\/p>\n Q.2 What is Electrostatic Induction?<\/strong><\/p>\n Ans: Electrostatic Induction: In the presence of a charge body, an insulated conductor develops positive charge at one end and negative charge at the other end. This process is called the electrostatic induction. <\/a><\/p>\n Q.3 What is function of Electroscope? <\/strong><\/p>\n Ans: The gold leaf electroscope is a sensitive instrument used for detecting and testing the nature of charges on a body. <\/a><\/p>\n Q.4 What is gold leaf electroscope?<\/strong><\/p>\n Ans: This is an instrument for detecting and measuring static electricity or voltage. A metal disc is connected to a narrow metal plate and a thin piece of gold leaf is fixed to the plate. <\/a><\/p>\n Q.5 What is the numerical value of ‘k’ in Coulomb’s law?<\/strong><\/p>\n Ans: K is constant of proportionality. The value of k depends upon the medium between the two charges. If the medium between the two charges is air, then the value of k in Sl units will be (9 x 109<\/sup> N\u00a0 m2<\/sup>\/ C2<\/sup>). <\/a><\/p>\n Q.6 What is meant by point charge? <\/strong><\/p>\n Ans: Point Charge: Coulomb’s law is true only for point charges whose sizes are very small as compared to the distance between them. The Columb’s Law applied for point charges. <\/a><\/p>\n Q.7 Define electric field intensity. Write its SI unit.<\/strong><\/p>\n Ans: Electric field intensity: The electric field intensity at any point is defined as the force acting on a unit positive charge placed at that point. It is denoted by ‘E<\/b>‘<\/p>\n OR<\/p>\n The strength of an electric field at any space is known as electric field intensity.<\/p>\n Unit: SI unit of electric intensity is NC-1<\/sup>.<\/p>\n Formula: Electric intensity can he determine from the following formula.<\/p>\n E = F \/ q <\/a><\/p>\n Q.8 Define Electric Field. <\/strong><\/p>\n Ans: The electric field is a region around a charge in which it exerts electrostatic force on another charges. <\/a><\/p>\n Q.9 What is mean by Electric Field Line? What is its direction?<\/strong><\/p>\n Ans: The direction of electric field intensity in an electric field line can also he represented by drawing lines. These lines are known as electric lines of These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges. <\/a><\/p>\n Q.10 Describe two properties of Electric Field Lines. <\/strong><\/p>\n Ans: 1. Field lines never intersect each other.<\/p>\n 2. They are perpendicular to the surface charge.<\/p>\n 3. The field is strong when the lines are close together, and it is weak when the field lines move apart from each other.<\/p>\n 4. The number of field lines is directly proportional to the magnitude of the charge.<\/p>\n 5. Field lines are always move away from positive charge towards negative charge.<\/p>\n 6. The spacing between the field lines shows the strength of electric field. <\/a><\/p>\n Q.11 Define electric field lines and electric potential. <\/strong><\/p>\n Ans: Electric Field Line:<\/strong> An\u00a0electric field line\u00a0is an imaginary\u00a0line\u00a0or curve drawn through a region of empty space so that its tangent at any point is in the direction of the\u00a0electric field\u00a0vector at that point. The relative closeness of the\u00a0lines\u00a0at some place gives an idea about the intensity of\u00a0electric field at that point. These lines were introduced by Micheal Faraday.<\/p>\n Electric Potential:<\/strong> Electric potential at a point in an electric field is equal to the amount of work done to bringing a unit positive charge from infinity to that point. <\/a><\/p>\n Q.12 Define Electric Potential and give its mathematical equation.<\/strong><\/p>\n Ans: Electric potential at a point in an electric field is equal to the amount of work done in bringing a unit positive charge from infinity to that point. Q.13 In which direction will positively charged particle move in an electric field? <\/strong><\/p>\n Ans: A body in gravitational field always tends to move from a point of higher potential energy to a point of lower potential energy. Similarly. when a positive charge is released in an electric field, it moves from a point of higher potential to lower potential.<\/a><\/p>\n Q.14 Define Capacitor and write its formula.<\/strong><\/p>\n Ans: Capacitor: A device used for storing electric charges is called capacitor.<\/p>\n Formula: Potential difference is directly proportional to the charge Q deposited on the plate.<\/p>\n C = Q \/ V<\/a><\/p>\n Q.15 In which form a capacitor stores energy?\u00a0<\/strong><\/p>\n Ans: Capacitor stores energy in an electric field between two plates in the form of electrostatic potential energy.<\/a><\/p>\n Q.16 What is Dielectric in capacitor?\u00a0<\/strong><\/p>\n Ans: Dielectric: In Capacitors the medium between the two plates is air or a sheet of some insulator. This medium is known as dielectric.<\/a><\/p>\n Q.17 Define Capacitance and state its SI unit.<\/strong><\/p>\n Ans: Capacitance: The ability of the capacitor to store charge Is called capacitance. The capacitance of a capacitor is a ratio between charge and potential difference.<\/p>\n Symbol: It is denoted by ‘C’<\/p>\n Formula: C = Q \/ V<\/p>\n Unit: SI unit is Farad (F).<\/a><\/p>\n Q.18 What is Electrolyte?\u00a0<\/strong><\/p>\n Ans: Electrolyte:<\/strong> Those substance that conducts electric current as a result of dissociation in to positively and negatively charged particles called ions. Which discharged at negative and positives terminal. The most familiar electrolytes are acids, bases and salts.<\/a><\/p>\n Q.19 What is meant by Filter circuit?<\/strong><\/p>\n Ans: Capacitor can be used to differentiate between high frequency and low frequency signals such circuit is called Filter circuit.<\/a><\/p>\n Q.20 What is the effect of increasing area of capacitors plates on the charge storing capacity of capacitors?\u00a0<\/strong><\/p>\n Ans: When the area between two plates of capacitors is increased then the capacity of a capacitor increases.<\/a><\/p>\n Q.21 Describe any two characteristics of series combination of capacitors.<\/strong><\/p>\n Ans: Characteristics of series combination of capacitors:<\/p>\n i) Each capacitor has the same charge across it.<\/p>\n ii) The potential difference across each capacitor is different due to different values of capacitance.<\/a><\/p>\n Q.22 Why Electric bulb and Electric heater are not connected in series?\u00a0<\/strong><\/p>\n Ans: It is impracticable to connect an electric bulb and an electric heater in series because it will divide the voltage.<\/a><\/p>\n Q.23 Write the names of two types of capacitors and give one example on it.<\/strong><\/p>\n Ans: Types of Capacitors\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<\/strong><\/p>\n
\nforce. These lines were introduced by Micheal Faraday.<\/p>\n
\nMathematical Equation:<\/strong> If W is the work done in moving a positive charge q from infinity to a certain point in the field. The electric potential
\nV at this point would be given by V = W \/ Q <\/a><\/p>\n\n