PPSC Physics Chapter 6 Electricity and Magnetism With Answers

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PPSC Physics Chapter 6 Electricity and Magnetism

Sr. # Questions Answers Choice
1 According to Coulomb's law what happens to the attraction of two oppositely charged objects as their distance of separation increases. Increase Decrease Remain unchanged Cannot be determined
2 Two unchanged objects A and B are rubbed against each other, when object B is placed near a negatively charged object C the two objects repel each other Which of these statements is true abut object A. It remains uncharged It becomes positively charged It becomes negatively charged It is unpredictable
3 An object gain excess negative charge after being rubbed against another object which is. Neutral Negatively charged Positively charged either a, b, or c
4 In order to measure the true emf of an electrolytic cell it is necessary that. The measurement be made while charging the cell No current be drawn from the cell The cell be connected into a type circuit The cell be connected into a parallel type circuit
5 The best instrument used for the measurement of emf of a cell a A voltimeter An ammeter A potentiometer Wheatstone bridge
6 A voltmeter is a High resistance galvanometer Low resistance galvanometer Zero resistance galvanometer Infinite resistance galvanometer
7 A resistance is a device which Acids the flow of current is a circuit Converts electrical energy to heat Is a type of charge pump Is like a switch
8 To measure the accurate value of potential difference across two points, the voltmeter should have. Zero resistance small resistance Large resistance Infinite resitance
9 If the source of emf is traversed from negative to positive terminal the potential charge. Is negative Is positive Is zero Remain the same
10 Which one of the following is not a measure of electric power. Vi I2R VR2 V2/R
11 The resistance of a wire does not depend upon. Area of cross section of the wire Length of the wire Temperature of the wire Current passing though the wire
12 Electromotive force is closely related to. Inductance Magnetic flux density Potential difference Electric field intensity
13 Current in an electrolyte is carried by. Electron only Anions only Citations only Mesons only
14 Charge carriers in thermocouples are. Anions Cations Electrons Protons
15 Which of the following parameters is irrelevant for a fuse wire. Its radius Current flowing through it. Its specific resistance Its length
16 A 800 W toaster and a 1.3 kW frying pan are plugged into the same 120 V lines, then Fuse will not blow Fuse will blow Supply will spark Only toaster can work
17 The steady current which produces the same heating effect in a resistance in a given time as the alternating current does in the same resistance in the same time is called. Induced current Root mean square value of an alternating current Mean value of alternating current Electromotive force
18 Thermocouple is combination of. Thermocouples Capacitors in parallel Resistors in series Ammeter and voltmeter
19 When the battery is being charged its terminal potential difference than its emf is. Less Greater Double Squared root
20 When a direct current is passed though a junction formed of two dissimilar metals the junction becomes warmer or cooler depending on the. Current direction Thermocouple used Temperature gradient Amount of current
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