CIE iGCSE Co-Ordinated Science P4.2.1 Electrical charge Exam Style Questions Paper 1
Question
A student rubs a balloon against her hair. Electrons are transferred from the hair onto the balloon, and the hair and the balloon both become charged.
The hair is now attracted to the balloon.
Which row shows the charges on the hair and on the balloon after rubbing?
▶️Answer/Explanation
Ans :A
Question
A plastic rod is rubbed with a cloth and the rod becomes positively charged.
Why does this happen?
A Electrons move from the cloth to the rod.
B Electrons move from the rod to the cloth.
C Protons move from the cloth to the rod.
D Protons move from the rod to the cloth.
▶️Answer/Explanation
Ans : B
Question
A plastic rod is rubbed with a cloth causing a negative charge on the rod.
Which statements are correct?
1 The rod gains electrons.
2 The cloth loses electrons.
3 The cloth becomes positively charged.
(A) 1 and 2 only
(B) 1 and 3 only
(C) 2 and 3 only
(D) 1, 2 and 3
▶️Answer/Explanation
Ans: D
Question
Which electrical device transfers chemical energy into electrical energy?
(A) battery
(B) lamp
(C) electric motor
(D) television
▶️Answer/Explanation
Ans : A
Question
A plastic rod is rubbed with a cloth and the rod becomes positively charged.
What happens during this process?
A Negative charges move from the cloth to the rod.
B Negative charges move from the rod to the cloth.
C Positive charges move from the cloth to the rod.
D Positive charges move from the rod to the cloth.
▶️Answer/Explanation
Ans : B
Question
Two insulators are charged by rubbing them with a cloth.
After this, the charged insulators repel each other.
Which statement is a possible description of how the insulators become charged?
(A) One gained electrons and the other gained protons.
(B) One gained electrons and the other lost electrons.
(C) They both lost electrons.
(D) They both lost protons.
▶️Answer/Explanation
Ans : C
Question
A plastic rod is rubbed with a cloth. The rod becomes positively charged.
Which statement describes why this happens?
(A) Electrons move from the cloth to the rod.
(B) Electrons move from the rod to the cloth.
(C) Protons move from the cloth to the rod.
(D) Protons move from the rod to the cloth.
▶️Answer/Explanation
Ans: B
Question
Two charged rods X and Y repel each other.
Which row gives a possible description of how the rods became charged?
▶Answer/Explanation
Ans : A
Question
A cell is connected in a circuit.
Which statement describes how the electromotive force (e.m.f.) of the cell is measured?
(A) It is measured in newtons using a newton meter connected in parallel with the cell.
(B) It is measured in newtons using a newton meter connected in series with the cell.
(C) It is measured in volts using a voltmeter connected in parallel with the cell.
(D) It is measured in volts using a voltmeter connected in series with the cell.
▶️Answer/Explanation
Ans: C
Question
When two different, uncharged, insulating materials are rubbed together, one becomes positively charged and the other becomes negatively charged.
What happens to cause the materials to become charged?
▶️Answer/Explanation
Ans: C
Question
Object P is positively charged and object Q is negatively charged.
Which row describes the force between P and Q and explains how they became charged?
▶️Answer/Explanation
Ans: B
Question
A rod gains negative charge as it is rubbed with a cloth. What happens to the cloth in this process?
A. It gains electrons.
B. It loses electrons.
C. It gains protons.
D. It loses protons.
▶️Answer/Explanation
Answer: B. It loses electrons.
Explanation: When the rod gains negative charge, it means it has gained electrons. These electrons are transferred from the cloth, so the cloth loses electrons.
Question
A rod is rubbed with a dry piece of cloth. A scientist holds the rod in her hand and brings it close to a negatively charged plastic strip. The strip is suspended by an insulating thread. As the rod approaches the plastic strip, the strip moves towards the rod.
Which statement is correct?
A The rod is a negatively charged electrical conductor.
B The rod is a negatively charged electrical insulator.
C The rod is a positively charged electrical conductor.
D The rod is a positively charged electrical insulator.
▶️Answer/Explanation
Answer: D The rod is a positively charged electrical insulator.
Explanation: The negatively charged plastic strip is attracted to the rod, indicating that the rod has an opposite charge (positive). Since the rod is held by hand and the charge does not dissipate, it must be an insulator.
Question
Two rods made of different insulators are charged by friction using a cloth. One rod becomes negatively charged and the other rod becomes positively charged. What happens during the charging process?
▶️Answer/Explanation
Answer: C
Explanation: During charging by friction, electrons are transferred from one material to another. The rod that loses electrons becomes positively charged, while the rod that gains electrons becomes negatively charged.