Alternating Current MCQ's 1

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A test from chapter 16 i.e Alternating Current of Physics part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. When the magnetic flux changes at the rate of Δφ/Δt , then at distance “r”, the intensity of induced

A) E=1/2πr(Δφ/Δt)
B) E=2πr(Δφ/Δt)
C) E=1/3πr(Δφ/Δt)
D) E=2πr2(Δφ/Δt)

2. According to electric field between two charged plates, we can say that a changing electric flux creates _______:

A) Magnetic field
B) Perpendicular
C) Permeability
D) None

3. The field produces electromagnetic waves when an accelerating field is applied to a _______:

A) Magnetic field
B) char
C) Direction
D) none

4. The electromagnetic waves travel in free space with the speed of _______:

A) Light
B) Strength
C) Sopund
D) none

5. Velocity of electromagnetic waves depends upon _______ and electric permittivity:

A) Longitude
B) Magnetic permeability
C) Electric field
D) none

6. Electromagnetic waves emitted from _______ are transverse:

A) Antenna
B) Coil
C) Wire
D) Straight

7. The frequency range of electromagnetic waves is _______:

A) 10^6 Hz
B) 10^8 Hz
C) 10^9 Hz
D) 10^11 Hz

8. The velocity of electromagnetic waves and the velocity of light have _______ value:

A) Different
B) Same
C) Opposite
D) None of these

9. Sound waves travel with a speed _______ at 0 C:

A) 340 m/s
B) 350 m/s
C) 310 m/s
D) 330 m/s

10. We can convert sound waves into electrical oscillations by _______:

A) Microphone
B) Television
C) Radio
D) none