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 As electric field intensity is a potential gradient, if may be expressed ni the units of NC-1 or volt Volt metre Volt per metre Joule
2 When a conductor situated in a dielectric is charted the energy resides. Only on the dielectric Only on medium surrounding charge On the dielectric and medium both Only on the type of the charge
3 The amount of charge which can be placed on a conductor does not depend on. The dielectric strength of the surrounding medium. Its capacitance Its potential Its size or shape
4 Which electrical component may be used to store electrical energy in a time delay circuit Capacitor Light dependent resistor Resistor Thermistor
5 Which electrical component uses a low current circuit to switch a high current ON or OFF. Capacitor Diode Reed rely Thermistor
6 The dot product of electric intensity and area of a surface is equal to. Magnetic flux Electric flux Motional emf Induced emf
7 Which of these is not a method of charging. Friction or rubbing Induction Contact or touching Convection
8 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
9 The patch followed by charge in an electric field is. Circular LInear Parabolic Zig zag
10 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
11 Potential of earth's surface is. Negative Positive Zero Infinite
12 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
13 Since selenium becomes conductor in light so it is. Photoconductor Photocell Thermistor Photodiode
14 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
15 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
16 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
17 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
18 What is measured by the energy dissipated when a source drives a unit charge round a complete circuit. Electromotive force Potential difference Power Resistance
19 What is the smalless total resistance using only a 6 ohm and 12 ohm resistors. 2 Ohm 3 Ohm 4 Ohm 6 Ohm
20 What information is given by the tangent to a field that point of electric field. Magnitude Direction Proper unit Dimensions
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