PPSC Physics Full Book With Answers

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PPSC Physics Full Book

Sr. # Questions Answers Choice
1 A preset or trimmer can be a. Variable resistor Variable capacitor Variable inductor All of these
2 A resistor whose resistance decreases with increasing intensity is. Light dependent resistor Thermistor Thermocouple Strain gauge
3 What type of current is produced by batteries. Direct current Alternating current Pulsating current Convection current
4 A device used to measure the strain of an object and it is a type of resistor that changes value with applied strain is a thermistor Strain gauge Thermocouple Potentiometer
5 A device consisting two different conductors that produce a voltage proportional to the temperature difference between either end of the pair of conductors is a. Thermistor Thermocouple Strain gauge Potentiometer
6 A type of resistor whose resistance varies significantly with temperature is. Thermistor Thermocouple Strain gauge Potentiometer
7 Generally, electrical resistivity of intrinsic semiconductors decreases with increasing. Pressure Volume Temperature Density
8 For D.C. circuit the resistance can be taken as impedance with zero. Volt Ampere Phase angle Watts
9 The magnetic force is simply a Reflecting force Deflecting force Restoring force Gravitational force
10 The sensitivity of the galvanometer can be increased by increasing the Number of turns of the coil Area of the coil Strength of the magnetic field All of the above
11 The direction of force on a moving negative charge will be. Opposite to that of positive charge Similar to that of positive charge At right angel to the positive charge Parallel to the positive charge
12 Which of the following is not the SI unit of magnetic flux density. Wb m2 N A-1 m-1 <br>Tesla N mA-1
13 One weber is equal to. N A-1 N m-1 A N mA-1 N m-1 A-1
14 The SI unit of magnetic flux is. N A-1 N m-1 A N m A-1 N m-1 A-1
15 In the experiment of force on a current carrying conductor in a uniform magnetic field the magnitude of force depends upon which factor. Force is inversely proportional to current Force is directly proportional to current Force is inversely proportional to voltage Force is directly proportional to voltage
16 One Tesla is equal to. 1 N A-1 1 N m-1 1 N A -1 m 1 N A -1 m-1
17 Which one of the following describes a measure of opposition to alternating current. Electrical impedance Capacitance Inductance Admittance
18 The phenomenon of exactly zero electrical resistance occurring in certain materials below a characteristics temperature is called. Resistivity Conductivity Super conductivity Volume resistivity
19 Which materials have exactly zero electrical resistivity. Metals Insulators Semi conductors Super conductors
20 The measure of how strongly a material oppose the flow of electrical current is known as Electrical resistivity Specific electrical resistivity Volume resistivity All of the above
21 Conductance is the reciprocal of. Capacitance Inductance Resistance Admittance
22 In which process the passage of an electric current through a conductor releases heat. Joule heating Ohmic heating resistive heating All of these
23 House hold circuits are mostly Wired in sires Wired in parallel Made using wires of gold Made using wires of silver
24 Which physical law expresses the relationship between the heat generated and the current through a conductor. Ohm's law Kirchoff's law Joule's law Ampere's law
25 Which two terminal passive electronic component implements electrical resistance as a circuit element. Capacitor Inductor Resistor Transformer
26 What units are used to rate electrical fuses. Volts Ampere Watts Hertz
27 The Step up transformer Increase the input current Increases the input voltage Has more turns in the primary coil Has less time in the secondary coil
28 The direction of induced e.m.f in a circuit is in accordance with conservation of. Mass Charge Momentum Energy
29 Which part of D.C motor reverses the direction of current through the coil every half cycle. The armature The commutator the brushes The slips rings
30 A D.C Motor converts Mechanical energy into electrical energy Mechanical energy into chemical energy Electrical energy into mechanical energy Electrical energy into chemical energy
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