9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 08/12/2020
9th Standard Science Magnetism and Electromagnetism English Medium Free Online Test 1 Mark Questions 2020-2021
Download Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Induced current flows through a coil__________
more that the period during which flux changes through it.
less than the period during which flux changes through it
only for the period during which flux changes through it
None of the above
2.
At the centre of a magnet, the magnetism is____________
zero
same as the poles
maximum
minimum
3.
A magnetic field exerts no force on________
stationary electric charge
a magnet
an electric charge moving perpendicular to its direction
an unmagnetised iron bar
4.
The magnetic field produced due to a circular wire at its centre is_________
at 45° to the plane of the wire
at 60° to the plane of the wire
in the plane of the wire
perpendicular to the plane of the wire
5.
The direction of magnetic field around a straight conductor carrying current can be determined by____________
Fleming's left hand rule
Lenz's law
Right hand thumb rule
Fleming's right hand rule
6.
The unit of magnetic flux density is
weber
weber/metre
weber/metre2
weber. metre2
7.
Transformer works on.
AC only
DC only
both AC and DC
AC nor effectively than DC
8.
The part of the AC generator that passes the current from the armature coil to the external circuit is
field magnet
split rings
slip rings
brushes
9.
An electric generator converts
electrical energy into mechanical energy
mechanical energy into heat energy
electrical energy into electrical energy
mechanical energy into electrical energy
10.
Which of the following converts electrical energy into mechanical energy?
motor
battery
generator
switch
1.
(c)
only for the period during which flux changes through it
2.
(a)
zero
3.
(a)
stationary electric charge
4.
(d)
perpendicular to the plane of the wire
5.
(c)
Right hand thumb rule
6.
(c)
weber/metre2
7.
(a)
AC only
8.
(d)
brushes
9.
(d)
mechanical energy into electrical energy
10.
(a)
motor
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
