Electric Current Quiz The quiz is designed for the various curriculum students such as GCSE, IGCSE, ISC, IB, ICSE, CBSE and National Curriculum England. Start the quiz and learn science with fun! Quiz Level: Grade 8Total Questions: 20 1 / 40 In a metallic conductor, electric current is thought to be due to movement of ______. ions electrons amperes protons 2 / 40 If an atom loses an electron, it becomes ________ charged. negatively Neutral positively 3 / 40 Materials which allow larger current to flow through them are called as _____. Alloys Insulator Conductor Semi-conductor 4 / 40 In which type of change, we observe alteration only in specific property of matter but not composition? Chemical change None of these Physical change Both physical and chemical change 5 / 40 Find the type of current if it's only flows in one direction? None AC Current DC Current 6 / 40 What is the standard unit of measurement for electrical charge? Ampere Ohm Coulomb Volt 7 / 40 Good conductors have many loosely bound _________. Molecules Protons Atoms Electrons 8 / 40 The SI unit of current is _______. Ampere Coulomb Volt Ohm 9 / 40 Potential difference is measured in _____. amperes ohms volts columbs 10 / 40 Conventionally the direction of the current is taken as _______. the direction of flow of positive charge the direction of flow of molecules the direction of flow of atoms the direction of flow of negative charge 11 / 40 A 1.5V battery is connected across a metal wire of resistance 3Ω. Calculate the current in the wire. 4.5A 0.5A 3A 1.5A 12 / 40 Bakelite is a/an _______. Semi-conductor Conductor Insulator None of these 13 / 40 Electric bell works on the principle of ___________. all of these magnetic effect of current heating effect of current chemical effect of current 14 / 40 If you place a 50 Volt power source across a 10 Ohm resistor, what will the current be? 5 Amps 0.5 Amps 500 Amps 0.2 Amps 15 / 40 Which is an example of the build-up of static electricity? Generator Electromagnets Friction Lightning 16 / 40 In electrical wire copper is used for electrical conduction mainly because ______. it is very durable it is cheaper it has a high melting point it has low electrical resistaivity 17 / 40 A closed path through which electrons can flow is _________. circuit circus voltage current 18 / 40 Which of the following is not correct regarding electroplating. In this process electricity is used It is use to produce electricity It is use to provide coating of an electrode It is use to alter the appearance of an objects 19 / 40 According to Ohm's Law, current equals the voltage divided by the _________. Capacitance Power Resistance Inductance 20 / 40 What are all substances made from? Neutrons Protons Atoms Electrons 21 / 40 Find the type of current if it's constantly changes direction? None DC Current AC Current 22 / 40 Silicon is a ________. Insulator Semi-conductor Conductor Super-conductor 23 / 40 The current in a circuit equals the voltage difference divided by the resistance. Current law Ohm's law Voltage law Newton's law 24 / 40 In an electrolytic cell, the electrode that is connected to the positive terminal of the battery is called as ________. cathode cation anode anion 25 / 40 Chemical combination involves _________. Combination of two atoms Combination of only same type of elements Combination of any two or more elements or compounds Combination of only same type of compounds 26 / 40 The process by which a chemical change takes place in a substance when electric current is passed through it is called as _________. electrodes electrolysis thermionic conduction electrolysis 27 / 40 If the current is 2 Amps and the voltage is 8 Volts, what is the power? 0.25 Watts 4 Watts 10 Watts 16 Watts 28 / 40 In the direction of electric field, the electric potential _______. becomes zero increases remains uncharged decreases 29 / 40 When the ends of metal wire are not connected to a battery the _______. electrons move from positive electrode to negative electrode protons move in random direction electrons move from negative electrode to positive electrode electrons move in random direction 30 / 40 The unit of energy is ______. Watt per hour Kilowatt per hour Joules Kilowatt 31 / 40 The existence of a negative charge on a body implies that it has _________. acquired some protons from outside acquired some electrons from outside lost some of its protons lost some of its electrons 32 / 40 Cathode is _______. a negatively charged ion formed in the electrolyte negatively charged electrode a positively charged ion formed in the electrolyte positively charged electrode 33 / 40 Electric current is ____. work done per unit time flow of charge per unit time all of the these resistance per unit time 34 / 40 If you have a 12 Volt battery placed across a 6 Ohm resistor, what will the current be? 72 Amps 18 Amps 0.5 Amps 2 Amps 35 / 40 Potential difference is measured using______. electroscope wattmeter voltmeter ammeter 36 / 40 When a glass rod is rubbed with silk, it acquires a positive charge because ___________. Protons are added to it Electrons are removed from it Electrons are added to it Protons are removed from it 37 / 40 A closed path that electric current follows is? Voltage Difference Electric Circuits Resistance Batteries 38 / 40 An electrolyte is ________. a liquid that conducts electricity none of these a light electric cell a metal 39 / 40 When the path of current, starting from one terminal of cell, ends at the other terminal of the cell is broken at some point, then such a circuit is called as _______. closed or complete circuit open or incomplete circuit Either open or closed circuit None of these 40 / 40 When two bodies are charged together by rubbing each other then both of them acquire ___________. None of these Unequal and opposite charges Equal and opposite charges Unequal charges Please enter your name below. Name Your score is LinkedIn Facebook VKontakte 0% Restart quiz Exit Send feedback ← Science Quiz Index Series & Parallel Circuits →