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