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 If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be 2.120<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span> 0.212<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span> 21.2<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°A</span> 0.14<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">°</span><div><span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">a</span></div>
2 When a high energy photon interact with a metal, which of the following effect is most likely to be taken place pair production photoelectric effect Compton effect None of these
3 When low energy photon interact with a metal,which of the following effect is likely to be taken place pair production photoelectric Compton effect None of these
4 Compton was awarded Nobel prize in physics in 1921 1923 1925 1927
5 In the compton's effect, it is found that the wavelength of incident x-rays is greater than the wavelength of scattered x-rays equal to the wavelength of scattered x-rays less than the wavelength of scattered x-rays any one of these
6 Current is measured in volts watt ohm ampere
7 Resistance is measured in volts ampere ohm watt
8 Avo-meter is used of measure the current, voltage voltage, resistance resistance, current current, voltage and resistance
9 A resistance used in galvanometer to make it voltmeter is called shunt resistance high resistance zero resistance none of these
10 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into Voltmeter Avometer Ammeter None of these
11 A resistance used in voltmeter is called shunt resistance high resistance low resistance zero resistance
12 In order to make a voltmeter, high resistance is connected with galvanometer, in perpendicular may be paralled or pendicular series none of these
13 Which is modified form of galvanometer potentiometer battery voltmeter slide wire bridge
14 A voltmeter is used to measure the potential difference current temperature resistance
15 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as modification voltage current resistance
16 A full-scale deflection is obtained in a galvanometer with a current of few ampere volts milliampere ohm
17 The current is measured in volts watt ampere ohm
18 Ammeter is used to measure voltage resistance voltage and current current
19 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
20 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
21 The torque per unit twist of coil is called proportionality constant gravitational constant boltzman constant coupling constant
22 Method "lamp and scale arrangement" used to measure the angle of deflection restoring torque magnetic field strength current
23 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made Sensitive Accurate Stable None of these
24 The angle of deflection of coil can be measured by the one method three method two method none of these
25 A shunt resistance parallel to the galvanometer is used to convert it into avometer millimeter voltmeter none of these
26 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
27 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
28 The working of galvanometer depends upon torque exerted on a current carrying coil in magnetic field electric field gravitational field nuclear field
29 Galvanometer is a device used for the detection of voltage current temperature pressure
30 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
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