ALTERNATING CURRENT

Quiz
•
Professional Development, Physics
•
12th Grade
•
Hard
SANJAY NEMA
Used 18+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The induced emf in a closed coil of wire, according to Faraday’s Law, is proportional to:
I. The magnitude of the magnetic flux
II. The magnetic flux density
III. The number of turns
IV. The rate of change of magnetic flux
I
II
II and III (
III and IV
IV
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A changing magnetic field B induces an emf Ɛ in a coil of radius R, as shown figure. What is the induced emf in the coil of radius 2R?
Ɛ
2 Ɛ
4 Ɛ
Ɛ/2
Ɛ/4
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A uniform magnetic field is distributed in the space of a circle of radius r, as shown in figure. The changing field induces an emf Ɛ in the loop with radius r. What is the induced emf in the loop with radius 2r?
Ɛ
2 Ɛ
4 Ɛ
Ɛ/2
Ɛ/4
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The number of turns in a long solenoid is doubled; how does the inductance of the solenoid change?
It doesn’t change
It doubles
It quadruples
It is cut to a half
It is cut to a quarter
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following is true about an inductor?
I. It stores energy
after the current stops flowing
II. It opposes the
change of current
III. It can produce a
magnetic field
I
III
I and II
II and III
All of the above
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following can act as an inductor?
I. A long coil
II. A long wire
III. A conducting sphere
I
III
I and II
II and III
All of the above
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
At time t = 0, the switch is closed. Which of the following graphs best describes the voltage V across the resistance R as a function of time t?
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