ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test With Answers

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ECAT Pre General Science Physics Chapter 12 Electrostatics Online Test

Sr. # Questions Answers Choice
1 The substances whose resistance decreases with the increase in temperature these substances have coefficient of positive temperature negative temperature absolute temperature zero temperature
2 The fractional change in resistance per kelvin is known as temperature coefficient resistance coefficient super temperature critical temperature
3 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
4 The resistivity of a substance depends upon the length mass area temperature
5 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
6 The unit of conductance is ohm meter mho ohm-meter
7 The unit of resistivity is ohm ohm-m<sup>2</sup> ohm-meter ohm-m<sup>-1</sup>
8 Resistance of a conductor is increased, the currant will Decrease Increase Remain the same None of these
9 The resistance of a conductor does not depend on its mass resistivity length cross-sectional area
10 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
11 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
12 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
13 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
14 The potential difference across each resistance in series combination is same different zero none of these
15 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
16 The unit of resistance is volt ampere ohm coat
17 Physicist George Simon ohm was a German physical French physicist Chinese physicist Russian physicist
18 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
19 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
20 Resistor is a device which convert electric energy to Heat energy Chemical energy Elastic energy All of the above
21 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
22 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
23 The electrode connected with the positive terminal of the current source is called cathode anode electrolyte position
24 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
25 Ohm established a relation between voltage and resistance voltage and charge voltage and current voltage resistance and charge
26 The ohm's is defined as 1 ampere / 1 volts 1 coulomb / 1 volt 1 volt / 1 ampere 1 volt / 1 coulomb
27 The relation V = IR represents Ampere law Faraday's law Ohm's law Len's law
28 Ohm is the unit of current capacitance energy resistance
29 The graphical representation of ohm's law is hyperbola straight line ellipse parabola
30 The liquid which conduct current is known as heating effect chemical energy electrolyte ohm's law
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