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 How power factor of a circuit can be improved. Using capacitors Using cokes Using resistors All of these
2 Which device converts alternating current to direct current. Motor Generator Transformer Rectifier
3 Which is not the strongest and the most familiar type of magnetism. Diamagnetism Para magnetism Ferromagnetism All of these
4 What is the degree of magnetization of a material. Susceptibility Ablitity Retentivity Capacity
5 Slip Rings are used in D.C. dynamo A.C. dynamo Transformers Battries
6 The force on a point charge due to electromagnetic fields is called. Lorenz force Gauss's force Newton's force Ampere's force
7 Transformer make possible the transmission of A.C. power conversion of AC and D.C Cyclotron Particle accelerator
8 Capacitive reactance is measured in Henrys Ohms mhos electron volts
9 In alternating current circuits the quantity which plays the same role as resistance in direct current circuits is called. Reactance Admittance Conductance Impedance
10 Inductance divided by resistance and the product of capacitance and resistance both have units of. Charge Time Force Current
11 When current in an inductor is increasing energy is lost Energy is being stored in the magnetic field of the inductor Energy is being drained from the magnetic field of the inductor Eddy current is produced
12 An inductor may store energy in Its magnetic field Its electric field Its coils A neighboring circuit
13 Inductance are measured in Coulombs Volts Henrys Farads
14 Mutual inductance has a practical role in the performance of the Radiochoke Transformer Generator Trnasistor
15 In the magnetic circuit concept the quantity analogous to electric current in electric circuit analysis is. Magnetic flux density Permeability Magnetic field intensity Magnetic flux
16 Which of the following quantity is defined in terms of the rate of change of electric displacement field. Conventional current Electronic current Displacement current Pulsating current
17 How eddy current losses are reduced in A F and R F transformers. By using air cores By using shell cores By using laminated cores By using ferrite cores
18 They hysteresis losses are eliminated in power transformer by using Low resistivity power winding Low reflectance steel cores Laminated steel cores soft iron cores
19 If a person winds a coil of wire around a steel rod and then passes an electric current through the wire then the Steel rod becomes an electromagnet Steel rod becomes hot Wire becomes magnetized wire becomes demagnetized
20 Which equation in electromagnetism describe the magnetic field B generated by an electric current. ampere's circuital law Bio savart law Gauss's law for electromagnetism Coulomb's law
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