ECAT Pre Computer Science Chapter 14 online mcq test with answers for Physics chapter 14 (Electromagnetism)

ECAT Physics Chapter 14 Electromagnetism Online Test

Sr. #	Questions	Answers Choice
1	The voltage increases linearly with	time velocity acceleration torque
2	How many number of anodes used in electron gun	one two three six
3	Electron gun consist of	three anodes heating cathode three anodes three anodes , heating cathode, grid
4	A beam of electrons is provided by an	electron gun Suppray Injection None of these
5	Flurescent screen is a screen where visible spot	vanishes is made becomes small and large none of these
6	The CRO deflects the beam of electrons, when they passes through uniform	electric field gravitational field magnetic flax magnetic field
7	CRO deflects the beam of	proton a-particle electron neutron
8	(CRO) Cathode ray oscilloscope is a device used for high speed	velocity graph plotting time-velocity none of these
9	A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is	Zero 10<sup>5 </sup>m 10<sup>-10</sup>N 10<sup>8</sup>N
10	The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by	F=eVB F=e<sup>2</sup>V/B F=e/VB F=B<sup>2</sup>/ev
11	A charged particle moving at right angle to the magnetic field will experience	minimum force maximum force zero moderate force
12	When charged particle is projected perpendicular to a uniform magnetic field its trajectory is	circular elliptical cycloid straight line
13	Charge to mass ratio (e/m) of an electron is given by the relation	e/m = 2V/Br<sup>2</sup> e/m = 2V/B<sup>2</sup>r e/m = 2V/B<sup>2</sup>r<sup>2</sup> e/m = V/2B<sup>2</sup>r<sup>2</sup>
14	The e/m of an electron moving in a circular path in a magnetic field is equal to	V/Br V/B<sup>2</sup>r<sup>2</sup> V<sup>2</sup>/Br<sup>2</sup> V<sup>2</sup>/Br
15	Centripetal force for electron is given by	mv<sup>2</sup>/ r mv / r<sup>2</sup> mv<sup>2</sup>/ r mr<sup>2</sup>/ v

Download This Set