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CLASS 10 SCIENCE MCQ MAGNETIC EFFECTS OF ELECTRIC CURRENT
MAGNETIC
EFFECTS OF ELECTRIC CURRENT - I :MCQs AND SHORT ANSWERS
MULTIPLE-CHOICE
QUESTIONS
SELECT THE CORRECT ALTERNATIVE:
1.
Who was the first person to notice the magnetic effect of
electric current ?
A.
Faraday
B.
Ampere
C.
Oersted
D.
Volta
2.
The magnetic field produced due to the current passing
through a conductor is proportional to the _______.
A.
electric current
B.
conducting material
C.
length of conductor
D.
diameter of conductor
3.
The magnetic field produced at the center of a circular
wire is proportional to _______ and inversely proportional to _______.
A.
radius of loop, current
B.
current, radius of loop
C.
length of conductor, current
D.
weight of conductor, current
4.
The magnetic field of a solenoid is quite similar to that
of
A.
a straight conductor
B.
a horse-shoe magnet
C.
a bar magnet
D.
any magnet
5.
The principle of magnetic induction was given by _______.
A.
Michael Faraday
B.
Galileo
C.
Oersted
D.
Ampere
6.
The direction of a magnetic field is taken _______.
A.
north to south and back
B.
south to north and back
C.
north to south only
D.
south to north only
7.
What is the frequency of the current used domestically in
India ?
A.
50 Hz
B.
60 Hz
C.
110 Hz
D.
220 Hz
8.
In our domestic electric supply we use following three
colours of wire.
A.
red, blue, green
B.
red, yellow, blue
C.
red, black, green
D.
black, green, yellow
9.
The insulation cover on the earth wire is _______.
A.
red
B.
black
C.
green
D.
white
10.
The current passing through two separate lines (circuits)
of our houses is _______ A and _______ A
A.
5, 10
B.
5, 15
C.
10, 15
D.
2, 5
11.
The direction of magnetic field lines is taken
A.
north to south
B.
south to north
C.
entering both poles
D.
leaving both poles
12.
The magnetic field due to electric current in a conductor
is _______.
A.
in the direction of electric current
B.
in the direction opposite to electric current
C.
circular around the conductor
D.
in the center of the conductor
13.
Which device is used to convert electric energy into
mechanical energy ?
A.
electric generator
B.
solenoid
C.
electric motor
D.
electric iron
14.
The principle of electric generator is _______.
A.
conversion of electrical energy into mechanical energy
B.
conversion of electrical energy into thermal energy
C.
conversion of mechanical energy into electrical energy
D.
conversion of electrical energy into light energy
15.
Magnetic lines of force inside a solenoid are...
A.
from N to S
B.
from S to N
C.
circular
D.
intersect one another
ANSWERS
(1) C (2) A (3) B (4) C (5) A (6) C (7) A (8) C (9) C (10) B (11) A (12) C (13) C (14) C (15) B