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

Question # 1

The SI unit of magnetic induction is

Gauses A
Tesla B
Weber C
Weber² D

Question # 2

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Greater than 300 A
Smaller than 300 B
Equal to 300 C
Any of (A) or (B) D
Any of (A) or(C) E

Question # 3

The CRO is used for displaying the waveform of a given

current A
voltage B
both of them C
none of them D

Question # 4

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Point the direction of N-S
A
Set themselves tangential to the circle
B
Point in the direction of E-W
C
None of these
D
Point in direction of S-E E

Question # 5

The SI unit of magnetic induction is tesla which is equal to

Newton/ampere-meter or N/A-m A
Newton/ampere²-meter or N/A²-m B
Newton/ampere²-meter² or N/A²-m² C
Newton/ampere²-meter²or N/A²-m² D

Question # 6

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Maximum A
Minimum B
Zero C
Very small D
None of these E

Question # 7

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

90° A
75° B
0° C
180° D

Question # 8

Electron gun consist of

three anodes A
heating cathode B
three anodes C
three anodes , heating cathode, grid D

Question # 9

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

parallel to the field A
Perpendicular to the field B
At an angle of 45 to the field C
None of the above D

Question # 10

CRO deflects the beam of

proton A
a-particle B
electron C
neutron D

Question # 11

The sources of magnetic field are

isolated magnetic poles A
charges at rest B
charges in motion C
none of these D

Question # 12

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

Becomes Half A
Becomes double B
Is not affected C
Becomes one fourth D
None of these E

Question # 13

The current sensitivity of the galvanometer is

C/BAN A
BAN/C B
CAN/B C
CBN/A D

Question # 14

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

F=e(V x B) A
F= -e(V x B) B
F= e(B x V) C
Both a and c D

Question # 15

The torque per unit twist of coil is called

proportionality constant A
gravitational constant B
boltzman constant C
coupling constant D

Question # 16

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 A
voltmeter B
galvanometer C
avo-meter D

Question # 17

The force experienced by charged particle is maximum, if it moves

parallel to magnetic field A
perpendicular to magnetic field B
opposite to the magnetic field C
none of these D

Question # 18

In order to make a voltmeter, high resistance is connected with galvanometer, in

perpendicular A
may be paralled or pendicular B
series C
none of these D

Question # 19

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Heating effect of current A
Chemical effect of current B
Magnetic effect of current C
Electromagnetic effect of current D

Question # 20

Ammeter is used to measure

voltage A
resistance B
voltage and current C
current D

Question # 21

(CRO) Cathode ray oscilloscope is a device used for high speed

velocity A
graph plotting B
time-velocity C
none of these D

Question # 22

A resistance used in voltmeter is called

shunt resistance A
high resistance B
low resistance C
zero resistance D

Question # 23

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

-y direction A
+y direction B
+z direction C
-z direction D
None of these E

Question # 24

Flurescent screen is a screen where visible spot

vanishes A
is made B
becomes small and large C
none of these D

Question # 25

A resistance used in galvanometer to make it voltmeter is called

shunt resistance A
high resistance B
zero resistance C
none of these D

Question # 26

The SI unit of flux density is.

Tesla A
Weber B
Gaun C
Weber/meter D

Question # 27

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

Zero A
10⁵m B
10^-10N C
10⁸N D

Question # 28

The unit of flux density is also given by

Weber/m²or Wb . m^-2 A
Weber/mor Wb . m B
Weber/mor Wb . m^-1 C
Weber or Wb D

Question # 29

Tesla is the unit of

Magnetic induction or flux density A
Magnetic flux B
Self inductance C
None of these D

Question # 30

How many number of anodes used in electron gun

one A
two B
three C
six D

Sr.#	Question	Answer
1	The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the	A. magnetic flux B. magnetic induction C. magnetic field D. self inductance
2	A shunt resistance parallel to the galvanometer is used to convert it into	A. avometer B. millimeter C. voltmeter D. none of these
3	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	A. ammeter B. voltmeter C. galvanometer D. avo-meter
4	the current is pass through the straight wire. The magnetic field established around it has its lines of force:	A. Circular and endless B. Oval in shape and endless C. Straight D. Parabolic
5	A resistance used in voltmeter is called	A. shunt resistance B. high resistance C. low resistance D. zero resistance
6	The magnetic field inside a solenoid can be increased by:	A. Increasing n B. Decreasing I C. Increasing I D. By using iron core within solenoid
7	The sources of magnetic field are	A. isolated magnetic poles B. charges at rest C. charges in motion D. none of these
8	CRO deflects the beam of	A. proton B. a-particle C. electron D. neutron
9	If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:	A. Becomes Half B. Becomes double C. Is not affected D. Becomes one fourth
10	In order to make a voltmeter, high resistance is connected with galvanometer, in	A. perpendicular B. may be paralled or pendicular C. series D. none of these

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ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

ECAT Pre General Science Physics Chapter 14 Electromagnetism