ECAT Pre General Science Online Test With Answers

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ECAT Pre General Science Online Test

Sr. # Questions Answers Choice
1 The current is measured in volts watt ampere ohm
2 Ammeter is used to measure voltage resistance voltage and current current
3 A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called dead beat galvanometer stable galvanometer shunt galvanometer sensitive galvanomter
4 The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of ammeter voltmeter galvanometer avo-meter
5 The torque per unit twist of coil is called proportionality constant gravitational constant boltzman constant coupling constant
6 Method "lamp and scale arrangement" used to measure the angle of deflection restoring torque magnetic field strength current
7 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made Sensitive Accurate Stable None of these
8 The angle of deflection of coil can be measured by the one method three method two method none of these
9 A shunt resistance parallel to the galvanometer is used to convert it into avometer millimeter voltmeter none of these
10 In a moving coil galvanometer, the deflecting couple depends upon area of the coil number of turns of coil value of magnetic field all of the above
11 For the conversion of galvanometer into voltmeter, we connect a small resistance in series with galvanometer small resistance in parallel with galvanometer high resistance in parallel with galvanometer high resistance series with galvanometer
12 The working of galvanometer depends upon torque exerted on a current carrying coil in magnetic field electric field gravitational field nuclear field
13 Galvanometer is a device used for the detection of voltage current temperature pressure
14 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon Heating effect of current Chemical effect of current Magnetic effect of current Electromagnetic effect of current
15 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
16 The galvanometer can be made sensitive if the value of the factor C/BAN is constant small large none of these
17 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
18 The current sensitivity of the galvanometer is C/BAN BAN/C CAN/B CBN/A
19 The vector representation of force experience give the direction of magnetic field current length of conductor force
20 The fractional change in resistance per kelvin is known as temperature coefficient resistance coefficient super temperature critical temperature
21 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
22 The resistivity of a substance depends upon the length mass area temperature
23 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
24 The unit of conductance is ohm meter mho ohm-meter
25 The unit of resistivity is ohm ohm-m<sup>2</sup> ohm-meter ohm-m<sup>-1</sup>
26 Resistance of a conductor is increased, the currant will Decrease Increase Remain the same None of these
27 The resistance of a conductor does not depend on its mass resistivity length cross-sectional area
28 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
29 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
30 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
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