11/03/2020Electricity (Study by Topics Junior Class) 0Comments by Gate Academy Welcome to your Electricity (Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. A fine wire that becomes hot and produces light when an electric current passes through it is called a _________CircuitWireFilamentNichrome wire2. A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R2, then the ratio R1/ R2 is:251/251/553. A metal strand used to connect electrical devices in a circuit is a/an _________FilamentBatterySwitchWire4. What is resistance?Energy from batteryOpposition to currentAn increase in currentAn increase in voltage5. A low-resistance connection established by accident or intention between two points in an electric circuit is known as _____Open circuitClosed circuitDirect circuitShort circuit6. Electric current in a/an _____________________ circuit travels in ONE path.ParallelElectricSeriesWire7. A material through which electric current CAN pass easily in a/an ____ConductorTesterReceptorInsulator8. A circuit must have which of the following?Energy source, wire, switchEnergy source, wire, loadEnergy source, battery, loadBattery, wire, switch9. If in the given arrangement, the three resistors are replaced by a single resistor; then its resistance will be:9Ω18Ω4Ω6Ω10. What is the function of a fuse?Another name for a switchA protective device for breaking an electric circuit.A protective device to slow down the currentA wire with high resistance to prevent current from passing through11. What is charging by frictionAll of the aboveA process where objects from different materials rub against each other producing a net static charge on each (electrons bounce between)A process where you eat food really fast, causing your tummy muscles to rub against each otherA bone injury, most common when to bones rub against each other12. When two 2Ω resistances are in parallel, the effective resistance is0.5 Ω2 Ω1 Ω4 Ω13. What is static electricityAn electric charge, tends to make your feet swellAn electric charge, that comes and go's very quicklyAn electric charge, tends to stay on the surface of an object, rather than leaving quicklyThe motion of a laughing hyena14. If the current flowing through a fixed resistor is halved, the heat produced in it will become:One-fourthOne-halfDoubleFour times15. The material through which electric charge can flow easily isMicaCopperGermaniumQuartz16. A/An _____________________ is used to turn the electricity in a current on or off.SwitchInsulatorBatteryConductor17. When n resistors of equal resistances (R) are connected in series, the effective resistance isNR1/nRN/RR/n18. Which device is used to measure voltage?VoltmeterCircuit beakerAmmeterResistor19. Keeping the potential difference constant, the resistance of the circuit is halved. The current will become:HalfFour timesOne-fourthDouble20. A typical size-D battery has about how many volts?9 V1.5 V100 V0.05 V21 out of 20Time is Up!