Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 To convert galvanometer into ammeter we connect small resistance in parallel with galvanometer small resistance in series with galvanometer high resistance in series with galvanometer high resistance in parallel with galvanometer
2 The galvanometer can be made sensitive if the value of the factor C/BAN is constant small large none of these
3 A galvanometer is an instrument used to measure voltage across a circuit detect current in a circuit measure current flowing through a circuit none of these
4 The current sensitivity of the galvanometer is C/BAN BAN/C CAN/B CBN/A
5 The vector representation of force experience give the direction of magnetic field current length of conductor force
6 The fractional change in resistance per kelvin is known as temperature coefficient resistance coefficient super temperature critical temperature
7 If the length of the conductor is double and its cross sectional area is halved, its conductance will Increase four fold Become one-fourth Become one-half Remains unchanged
8 The resistivity of a substance depends upon the length mass area temperature
9 The SI unit of conductivity is ohm-m ohm<sup>-1</sup>m<sup>-1</sup> ohm-m<sup>-1</sup> ohm<sup>-1</sup>m
10 The unit of conductance is ohm meter mho ohm-meter
11 The unit of resistivity is ohm ohm-m<sup>2</sup> ohm-meter ohm-m<sup>-1</sup>
12 Resistance of a conductor is increased, the currant will Decrease Increase Remain the same None of these
13 The resistance of a conductor does not depend on its mass resistivity length cross-sectional area
14 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be 0.52 A 1 mA 0.7 mA 1.4 A
15 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is 11.0 ohm 1.0 ohm 7.0 ohm 3.0 ohm
16 If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be 6 ohm 4 ohm zero ohm 1.33 ohm
17 Resistance of a conductor depends upon the quantity of current passing through it the voltage applied between its end its dimensions, physical state and nature of its material all of the above
18 The potential difference across each resistance in series combination is same different zero none of these
19 Magnetic effect at a point caused due to flow a current depend upon the Quantity of current Distance from current Both the quantity of current and distance from current element None of the all
20 The unit of resistance is volt ampere ohm coat
21 Physicist George Simon ohm was a German physical French physicist Chinese physicist Russian physicist
22 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us parabola straight line hyper bola ellipse
23 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts? 10<sup>-1</sup>A 10<sup>-2</sup>A 10<sup>-4</sup>A 1 mA
24 Resistor is a device which convert electric energy to Heat energy Chemical energy Elastic energy All of the above
25 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is one ohm one joule one volt one ampere
26 Ohm's law states that The current through a resistor is directly proportional to the applied voltage The voltage across a resistor is directly proportional to the current passing through it Resistance is the constant of proportionality between the voltage and current all of these
27 The electrode connected with the positive terminal of the current source is called cathode anode electrolyte position
28 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as voltmeters resistance electrode current
29 Ohm established a relation between voltage and resistance voltage and charge voltage and current voltage resistance and charge
30 The ohm's is defined as 1 ampere / 1 volts 1 coulomb / 1 volt 1 volt / 1 ampere 1 volt / 1 coulomb
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