28/03/2020 Current Electricity and Electrical Quantities(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Current Electricity and Electrical Quantities(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. The I-V characteristics of two electrical components P and Q are shown belowWhich of these statements is incorrectAt 0.5 A the power dissipated in Q is double that in PThe resistance of Q decreases as the current in it increasesAt 1.9A the resistance of Q is approximately half of that of PP is a metallic conductor and Q is a thermistor2. Receiving an electric shock from a doorknob is an example of ____________. Spontaneous electricityCurrent electricityStatic electricity3. A battery is connected in series with a resistor R. The battery transfers 2000 C of charge completely round the circuit. During this process, 2500J of energy is dissipated in the resistor R and 1500J is dissipated in the battery. The e.m.f of the battery is2.00 V0.50 V0.75 V1.25 V4. If the electric current in a lamp decreases by 5 %, then the power output decreases by: 10%2.5%20%5%5. In a ____________ the switch is closed and electric current flows from the source through the connection device.Light bulbClosed circuitOpen circuitWire6. If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is aNo current dropCurrent dropPotential dropNo potential drop7. Current flows as long as there is a closed path that connects one battery terminal to the other battery terminal.FalseTrue8. When an electric current flows through a wire what is moving?Electrons move along along the wireAtoms move along the wireProtons move along the wireMolecules move along the wire9. As the current through a filament light bulb, its resistance increases. The best reason for this is:-The current increasesThe filament gets hotterThe potential difference increasesThe light gets brighter10. A typical size-D battery has about how many volts? 0.05 V1.5 V9 V100 V11. The quantity that has the same unit as e.m.f is PowerForceCurrentPotential difference12. In a parallel circuit the component with the largest resistance gets:- The least currentThe most potential differenceAll components get the same currentThe most current13. A toaster operating at 240V has a resistance of 120Ω. The power is2 W400 W240 W480 W14. A closed path that electric current follows is?Voltage DifferenceBatteriesResistanceElectric Circuits15. What is a steady flow of electricity called? A terminalA chargeA current16. Consider the following two statements (i) Free-electro density is different in different metals. (ii) Free-electro density in a metal depends on temperature. Seebeck effect is caused Due to (i) but not due to (ii)Due to both (i) and (ii)Neither due to (i) nor due to (ii)Due to (ii) but not due (i)17. A way to measure the resistance of objects and materialsSimple circuitVoltage differenceOhms LawElectric current18. When you attach a battery to an electric light bulb, what process makes the bulb light up? Chemicals moving from the battery through the wireProtons flowing from the battery into the bulbElectrons flowing through the circuit19. What is the unit for resistance? JoulesAmperesOhmsVolts20. Voltage difference is measured in _____. CentimetersElectrodesVoltsAmps21. What do the stripes indicate?Amount of resistanceAmount of voltageAmount of currentAmount of energy22. There are four places that must be connected on the battery and bulb in order for the bulb to light.FalseTrue23. Which of these materials is an insulator? CopperAluminum foilRubber24. There is no met movement of electrons in one direction.TrueFalse25. A wire of uniform cross-sectional area has a resistance R. The wire is stretched until its length increases by 10%. By assuming that the new wire has the same volume as before, the resistance of the new wire is1.1 R1.0 R1.2 R0.9 R26 out of 25Time is Up! Time's up
