PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 Which electrical component may be used to store electrical energy in a time delay circuit Capacitor Light dependent resistor Resistor Thermistor
2 Which electrical component uses a low current circuit to switch a high current ON or OFF. Capacitor Diode Reed rely Thermistor
3 The dot product of electric intensity and area of a surface is equal to. Magnetic flux Electric flux Motional emf Induced emf
4 Which of these is not a method of charging. Friction or rubbing Induction Contact or touching Convection
5 Coulomb's law for the electrostatic force between two electric charges resembles the Law of conservation of energy Law of conservation of mass Newton's law of gravitation Newton's law of motion
6 The patch followed by charge in an electric field is. Circular LInear Parabolic Zig zag
7 What happens to a soap bubble, when some charge is given to it. It collapses It increases in size It decreases in size It feels nothing
8 Potential of earth's surface is. Negative Positive Zero Infinite
9 Which field is produced by electric charge on a body at rest. Electric field only Magnetic field only Neither electric nor magnetic field Both electric and magnetic fields
10 Since selenium becomes conductor in light so it is. Photoconductor Photocell Thermistor Photodiode
11 Why a positively charged object is made neutral by someone touching it. Electrons flow from the object Protons flow onto the object Protons flow from the object Protons flow onto the object
12 Why a positive charged object is made neutral by someone touching it. Electrons flow from the object Proton flow onto the object Protons flow from the object Proton flow onto the object
13 A capacitor of capacitance F micro is fully charged from a 20 V d.c supply what is the energy delivered by 20 V supply. 2 mJ 10 m j 20 mJ 25 mj
14 An electrical device is rated at 12 W , 2 A How many 1.5 V batteries are needed in the device. 2 4 6 8
15 What is measured by the energy dissipated when a source drives a unit charge round a complete circuit. Electromotive force Potential difference Power Resistance
16 What is the smalless total resistance using only a 6 ohm and 12 ohm resistors. 2 Ohm 3 Ohm 4 Ohm 6 Ohm
17 What information is given by the tangent to a field that point of electric field. Magnitude Direction Proper unit Dimensions
18 in the region where the field lines are parallel and equally spaced, the field is. Zero Unirorm Non uniform Negative
19 The direction of electric field line surround the test charge -q id Parallel Perpendicular Radially outward Radially inward
20 The potential difference between two points is equal to the difference of Kinetic energy potential energy Electric current Charge energy
21 If air is replaced by any other dielectric medium, the force between two charges. Decreases Increases Remain the same Becomes infinity
22 Which of the following statemtents is worng. Charge is quantized Charge is conserved There is not field near an isolated charge at rest A moving charge produces both electric and magnetic field.
23 Which onw of the following is deflected by an electric field. Alpha particles Gama rays Neutrons x rays
24 The minimum value of charge on any object is. 1.6 x 10<sup>-29</sup> C 1.6 x 10<sup>-19</sup> C 1.6 x 10<sup>-9</sup> C 1 C
25 The value of electric field intensity is. Volt Coulomb Newton Newton coulomb
26 Electric field lines Start from a negative charge and terminal ate on a positive charge Never cross each other Always cross each other Leaving a positive charge are not proportional to the maginitud of charge
27 Which is the fundamental quantity in electrostatic. Electric charge Electric potential Electric field Electric field intensity
28 A LASER beam may be used to measure very large distance because it is. Unidirectional Coherent Monochromatic Massive
29 LASER is a device for Producing a beam of white light Producing a beam of monochromatic and coherent light Producing a beam of high intensity incoherent light. Producing highly penetrating's X -rays
30 LASER beam can be used to generate three dimensional images objects in the process called. Tomography Holography Autography Biography
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