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Subject Content Requirements

Q1 A piece of polythene is rubbed with a cloth duster. The polythene becomes negatively charged and the cloth becomes positively charged. What happens to the polythene and to the cloth to cause this?

Q2 In an electrostatics experiment, a plastic rod is rubbed with a cloth. The cloth becomes negatively charged. Which diagram shows the charge on the rod, and describes the movement of charge?

Q3 When a plastic rod is charged positively by friction,

Q4 What will happen when a polythene rod is rubbed with a wooden cloth?

Q4 explanation

Q5 When an ebonite rod is rubbed with a duster, the rod becomes negatively charged. The reason is because

Q6 Two very light, charged balls P and Q are hung, one above the other, from nylon threads. When a negatively charged plastic sheet is placed alongside them, P is repelled and Q is attracted. What are the original charges on P and on Q?

Q7 On a stormy day, a large, positively-charged cloud is above a tree. An electrical charge is induced on the tree as charged particles flow through it. What is the charge induced on the tree and how do the charged particles move?

Q8 The diagram shows a side view of a negatively charged oil drop at rest between two charged metal plates. What happens to the oil drop if its negative charge is reduced?

Q9 If a positively charged glass rod is held near a fine stream of water falling from a tap, the stream of water will

Q10 An uncharged metal rod is placed on top of a glass beaker. A neutral metal coated ball hanging from a thread just touches one end. A charged rod is brought into contact with the first rod and then removed. Which of the following takes place?

Q11 Which diagram correctly shows the electric field lines between two point charges?

Q12 Which diagram correctly shows the electric field between two charged spheres?

Q13 Which diagram best illustrates the electric field around a positive point charge?

Q14 Which diagram best represents the electric field around a negatively charged conducting sphere?

Q15 In the diagram below, A is a point near a positively charged sphere. Which vector best represents the direction of the electric field at point A?

Q16 A positive charge is in a uniform electric field, as shown. In which of the directions shown must the charge be moved in order to gain electric potential energy?

Q17 The diagram shows electric field lines around two isolated point charges P and Q. At X the field strength is zero. Which of the following statements is true?

Q18 Two equal positive point charges, A and B are positioned as shown below. At which location is the electric field intensity due to these two charges equal to zero?

Q19 Which of the following statements about an electrical insulator is correct?

Q20 Two insulated and uncharged metal spheres X and Y are touching. While a positively charged rod is near X, the spheres are moved apart. After this action, X has a negative charge. What will be the charge on Y?

Q21 A metal ball is charged by induction. To do this, a charged rod is held close to one side of the ball and the other side is earthed. Which diagram shows the charge distribution at this stage of the experiment?

Q22 A negatively-charged sphere X is brought up to an identical uncharged sphere Y. Sphere Y is ‘earthed’ by touching it with a finger, which is then removed. Sphere X is then moved away from sphere Y. What is the final charge, if any, on sphere Y?

Q23 A negatively charged rod is brought near two isolated metal balls X and Y. X is then earthed momentarily as shown in the diagram. If the rod is then removed, what charge would the balls possess?

Q23 explanation

Q24 A positively charged metal sphere is placed between two uncharged metal spheres, where one of which is grounded to the earth. Which diagram correctly shows how changes are distributed on the spheres?

Q25 A conducting sphere X is charged positively. The sphere X is touched with a similar sphere Y, which is initially neutral. The spheres X and Y are then separated. What are the types of charges left on X?

Q26 In order to make both of the following two metal spheres positively charged, what should be done?

Q27 A student tries to charge an insulated neutral metal cylinder using the following steps. After this process, the cylinder would most likely be

Q28 Two metallic spheres X and Y are placed in contact, and a positively charged rod Z is then brought near them as shown below. Now, if Y is earthed without removing Z as shown, then

Q29 An electrostatically charged object will pick up small pieces of paper. Which of the following will not pick up pieces of paper?

Q30 A charged metal ball is lowered into an uncharged hollow metal can. The ball finally touches the can. What will be the final charge on the outside, inside of the can and on the metal ball?

Q31 A charged sphere is suspended by an insulating thread inside a metal can. The outside of the can is earthed. Which diagram shows the resulting charges on the sphere and on the can?

SQ1 Triple sphere question

SQ2 (part 1) Thunderstorm electric field

SQ2 (part 2) Thunderstorm define potential difference

SQ3 Charged sphere and plate

SQ4 Electrostatic paint spraying

SQ5 Microprocessor factory

SQ6 Making sandpaper

SQ7 Electrostatic precipitator