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