PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 At which temperature a ferromagnetic material is converted into a paramagnetic one. curie temperature Boyle's temperature Natural temperature Neutral temperaturre
2 Which incapability of the materials is represented by the phenomenon of hysteresis. Magnetic saturation Low susceptibility Retrace the path Orientation
3 Para magnetism is. A distrotion effect An orientation effect A skin effect A resistance
4 The cause of ferromagnetism is. Orbital motion of elections spin Motion of electrons Permanent dipole memento Spin angular momentum
5 A capacitor is prefect insulator for Direct current Alternating current Direct as well as alternating current Pulsating current
6 Two pure inductors each of self inductance L are connected in parallel The total inductance of the combination is. L 2L L/2 L/4
7 An induced emf in a coil is independent of Time Resistance the number of turns in a coil The charge in the magnetic flux
8 The value of magnetic field strength for parament magnets is. Unity Infinity Zero Two
9 Magnetic moment is a Scalar Vector Phasor Tensor
10 A magnet is pushed horizontally towards a coil of insulated wire inducting an emf in the coilin which direction does the coil try to move. Downwards Upwards Away from the magnet Towards the magnet
11 The energy stored per unit volume inside the solenoid is called. Energy density Mass density Charge density Volume density
12 The ration of intensity of magnetization to the magnetic force is known as. Parmeability Magnetic induction Magnetic intensity Magnetic susceptibility
13 When a diamagnetic substance is inserted in a current carrying coil the magnetic field is Decreased Increased unchanged Increased or decreased, depending upon the relative volume of the substance
14 Work can be stored in an inductor as. Elastic P.E. Electrical P;E. Gravitational energy K.E.
15 The magnitude of induced emf during electromagnetic induction is controlled by. Magnetic flux electric flux Electric field Magnetic field
16 Which of the following is an example of induced magnetism. A compass needle pointing north A north pole attracting iron filings A northpole repelling a north pole The coil of a motor turning in a magnetic field.
17 A generator produces 100 kW of power of a potential difference of 10 kV the power is transmitted through cables of total resistance 5 Homs How much power is dissipated in the cables. 50 W 250 W 500 W 5,000 W
18 Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P. 0.02 0.25 0.33 0.50
19 An electrical source with internal resistance's' is said to operate a lamp of resistance R what fractions of the total power is delivered to the lamp. R+r/R R-r/R R/R+r r/R-r
20 For which material magnetic susceptibility is negative. Paramagnetic Diamagnetic Ferromagnetic All of these
21 Which law states that an induced current is always in such a direction as to oppose the motion or change causing it. Ampere's law Gauss's law Lenz's law Kirchoff's law
22 The property of an object that causes it to create a magnetic field in opposition to an externally applied magnetic field is. Paramagnetism Diamagnetism Ferromagnetism Demagnetism
23 Which of the following materials has highest magnetic suscaptibility. Uranium aluminium Platinum Sodium
24 Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field. Curie's law Voltmeter Ammeter Wattmeter
25 The vertical component of earth's magnetics field is zero. At magnetic poles At geographical poles At magnetic equator Everywhere
26 A current carrying loop lying-in a magnetic field behaves lime a. Magnetics pole Magnetic material Magnetic dipole Horse shoe magnet
27 Magnetic lines of force due to earth's horizontal magnetic field are. Curved lines Elliptical concentric circles Parallel and straight
28 The ratio of average induced emf to the rate of changing of current in the coil is called. Self induction Mutual induction Self inductance Mutual inductance
29 The phenomenon in which a charging current in one coil induces an emf in another coil is called. Induced current Induced emf Self induction Mutual induction
30 A expression for total work done by the battery to move charge against an induced emf is equal to. W = LI2 W = 1/2 LI W = 1/2 L3I W = 1/2 LI2
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