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7th Standard
TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - ஒன்றல்ல இரண்டல்ல Important Questions And Answers Study Material - QB365 Set A
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Published on: 01/11/2019
Term 2 Electricity
Download Tamil Nadu 7th 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.
In which of the following circuits are the bulb connected in series?
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2.
Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?
2.5 mA
25 mA
250 mA
2500 mA
3.
In the circuit shown, which switches (L, M or N) must be closed to light up the bulb?
switch L only
switch M only
Switch M and N only
either switch L or switches M and N
4.
In the circuit diagram below, 10 units of electric charge move past point x every second What is the current in the circuit _______
10 A
1 A
10 V
1 V
5.
S.I. unit of Electrical conductivity of a conductor is -----------
6.
In conducting materials electrons are ------------- bounded with atoms.
7.
--------- is used to measure the electric current.
8.
One unit of coulomb is charge of approximately ------------ protons or electrons.
9.
The direction of conventional current is ------------ to electron flow.
10.
The electrical conductivity of the semiconductor is in between a conductor and an insulator.
11.
The representation of the electric current is A.
12.
In a parallel circuit, the electric components are divided into branches.
13.
The fuse wire does not melts whenever there is overload in the wiring.
14.
Electron flow is in the same direction to conventional current flow.
15.
Fuse
16.
Miniature circuit Breaker
17.
Circuit
18.
Switch
19.
Cell
1.
(b)
2.
(c)
250 mA
3.
(d)
either switch L or switches M and N
4.
(a)
10 A
5.
( )
Siemens/meter (S/m)
6.
( )
loosely
7.
( )
Ammeter
8.
( )
6.242 x 1018
9.
( )
opposite
10.
True
11.
False.
The representation of the electric current is 'I'.
12.
True
13.
False.
The Fuse wire melts whenever there is overload in the wiring.
14.
False.
Electron flow is in the opposite direction to conventional current flow.
15.
Reset by hand, circuit becomes complete once again
16.
safety device used in electric circuit
17.
A complete path for the flow of an electric current
18.
Used to open or close a circuit
19.
A device which converts chemical energy into electrical energy.
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
