Republic of the Philippines Department of Education REGION IV-A CALABARZON SCHOOLS DIVISION OF BATANGAS TUY SENIOR HIGH SCHOOL OFFICE OF THE PRINCIPAL Summative Test in General Physics 1 Electric Charges, Forces and Fields Week 1, Quarter 3 I. Multiple Choice. Read and analyze the statements that follow. Write only the letter of the correct answer on a separate sheet of paper. (10 pts) 1. If two balloons have the same charge, what will happen if you place them close to each other? A. Nothing C. They will pop B. They will be attracted D. They will push each other away 2. It is a material in which electrons can move easily. A. Circuit B. Insulator C. Resistance D. Conductor 3. After you rub a balloon on your hair, the balloon has a negative charge. What charge does your hair have? A. Positive B. Negative C. Neutral D. Cannot be determined 4. Which of the following statements is false about electric field lines? A. electric field lines cannot cross B. electric field lines point away from positive charge C. electric field lines are always straight lines D. electric field lines show how a proton would move in an electric field 5. Which diagram correctly shows the electric field around a negative charge? A. A B. B 6. Which of the following is true about electric charge? A. It can be lost B. It can be destroyed C. Both are positive D. Both are negative C. It is created from a chemical reaction D. it can be transferred from atom to atom 7. Electron spins around a nucleus of an atom. What is the charge of an electron? A. -1.06 x 10-19C B. -6.10 x 10-19C C. -1.60 x 10-19C D. -1.60 x 1019C 8. What do you call the law that quantifies the force of attraction and repulsion between charged bodies? A. Newton’s Law B. Faraday’s Law C. Coulomb’s Law D. Cavendish’s Law 9. Which, among the following is the correct expression for an electric field? A. E=F/C B. E=FC C. E=F/Q D. E=FQ 10. What is the charge of an electroscope done by induction? A. same charge as the charging body C. a neutral charge B. opposite charge as the charging body D. a static electric charge II. Problem Solving. Read and analyze the problems below. Show your neat and complete solution on a separate sheet of paper. (15 pts) 1. A pithball has a charge of -1.00 C. (a) What charges are in excess in this ball? (b) How many of these charges is/are present in the ball? Use e- = -1.60x10-19 C. (Hint: q=ne-) (5 pts) Address: Luna St. Tuy, Batangas 043 276 0045, 0956 511 6543 tuyshs342207@gmail.com, maverla.alvaran@deped.gov.ph Page 1 of 2 2. Find the magnitude of electric field 50.0 cm from an electron. (5 pts) 3. A 3.00 µC charge is in the middle of two fixed charges of magnitude -4.00 µC and 5.00 µC. If the latter charges are 1.00 m apart, what net force does the first charge experienced? (5 pts) III. Picture Analysis. Study the diagram of charging by induction below. Describe the situation/scenario in each diagram on your answer sheet. Scoring Rubrics for Essay/Short-answer questions POINTS 10 9 7 6 5 DESCRIPTION Answers are comprehensive, accurate and complete. Key ideas are clearly stated and well supported Answers are accurate and complete. Key ideas are clearly stated and well supported. Answers are accurate and complete. Key ideas are stated and supported. Answers are not comprehensive or completely stated. Key points are addressed but not well supported. Answers are partial or incomplete. Question not adequately answered. PREPARED: CHECKED / NOTED: RUFFA MAE V DUMAN Special Science Teacher I Address: Luna St. Tuy, Batangas 043 276 0045, 0956 511 6543 tuyshs342207@gmail.com, maverla.alvaran@deped.gov.ph MA VERLA AFRICA ALVARAN Principal II Page 2 of 2
