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 Lagging of magnetic flux density behind the magnetizing fled is known as. susceptibity Diamagnetism Hysteresis Retentivity
2 The material of an electromagnet should have high Permeability susceptibility Retentivity Hysteresis loss
3 Which of the given factors is increased in a step down transformer. Voltage Current Wattage Resistance
4 When a following field is governed by Maxwell's equations. Electrodynamics Optics electric circuits All of these
5 In the concept of magnetic circuit, the quantity analogous to resistance in Ohm's law is. Reactance Dipole Impedence Reluctance
6 An instrument used to find the direction of the earths magnetic field is known as. Magnetometer Electroscope Cyclotron Particle accelerator
7 The basic quantity used to describe the state of magnetization of a substance is the Magnetic strength Magnetic susceptibility Magnetic moment Magnetic moment per unit volume
8 A charged particles moving in a magnetic field experiences a resultant force. Proportional to its K.E. In the direction of the field In the direction opposite to its motion In the direction perpendicular to both the field and its motion
9 The magnetic induction is also called the Magnetic intensity Magnetic flux Magnetic flux density Magnetic magnetization
10 A magnetic pole Is made of a magnetic material Is a factious quantity Is defined in terms of Ampere's law Cannot be detected
11 A magnetic field is said to exist at a point if A force is exerted on a charge placed at that point A magnetic pole exists at that point An ampersand current loop surrounds the point A force not felt by a static charge acts on a moving charge placed at that point
12 What does a dynamo generate Electrons Emf anion Cation
13 The immediate cause of alternating currrent in the secondary coil of a transformer is A changing electric field a changing magnetic field The motion of primary coil The iron core of the trnasformer
14 When a charged particle moves through a magnetic field it suffers a change in its Charge Mass Energy Direction of motion
15 In which form energy in an inductance coil is stored. Heat energy Light energy Magnetic energy Nuclear energy
16 An alternating current can be produced by Turbine Electric motor Generator Trnasormer
17 Why choke coil is used in an AC circuit. To decrease D.C. To increases A.C. To decreases A.C To increase D.C
18 The impedance of a pure anti resonant circuit at resonance is. Zero Unity Infinity 0.5
19 The electric supply line in houses works at 220 V what will be the amplitude of emf. 120 V 331 V 220 V 440 V
20 What is the power factor of LR circuit. Unity Zero infinity Between 0 and 1
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