A circular antenna of area 3 m2 is installed at a place in Madurai. The plane of the area of antenna is inclined at 47º with the direction of Earth’s magnetic field. If the magnitude of Earth’s field at that place is 40773.9 nT find the magnetic flux linked with the antenna.
Physics

Quiz
•
Physics
•
11th Grade
•
Medium
Yokhanan Lo
Used 12+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
89.47
72
60.98
100.54
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A closed coil of 40 turns and of area 200 cm2, is rotated in a magnetic field of flux density 2 Wb m-2. It rotates from a position where its plane makes an angle of 30º with the field to a position perpendicular to the field in a time 0.2 sec. Find the magnitude of the emf induced in the coil due to its rotation.
15V
10V
4V
2V
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The magnetic flux of the initial coil has 200 loops changes by 0.06 Wb in 0.4 seconds. The magnetic flux of the final coil has 0.08 Wb in 0.2 seconds. If a number of loops of the final coils are substituted with the half number of the first coil’s loops, determine the ratio of the induced emf of the initial loops and the final loops.
3:7
4:5
1:2
3:4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the current i flowing in the straight conducting wire as shown in the figure decreases, find out the direction of induced current in the metallic square loop placed near it.
Clockwise
Anti-Clockwise
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A copper disc 20 cm in diameter rotates with an angular velocity of 60 rev s-1 about its axis. The disc is placed in a magnetic field of induction 0.2 T acting parallel to the axis of rotation of the disc. Calculate the magnitude of the e.m.f. induced between the axis of rotation and the rim of the disc.
0.102 V
0.405 V
0.377 V
0.734 V
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a magnetic field?
a region of space where a mass experiences a force.
the physical property of matter that causes it to experience electromagentic force.
force of attraction between two magnets.
a region of space where a magnetic pole experiences a force.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the SI unit of tesla?
kg.s^-2.A^-1
N.m^1.A^-1
N.m^-1.kg^-1
kg.m^-1.A^-1
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