Download App

Electromagnetic Induction — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Induction1 Mark
MCQ
Complete the following statement. For electromagnetic induction to occur:
  • A
    a magnet must be at rest within a coil of wire
  • B
    a coil of wire must be at rest relative to the magnet.
  • C
    a magnet must move through a coil of wire.
  • D
    a magnet and a coil must have the same velocity.
✓

Answer

  1. a coil of wire must be at rest relative to the magnet.

Explanation:

Current is induced in a coil when flux through the coil changes. The flux through the coil changes when a magnet moves relative to the coil and coil is at rest relative to the magnet.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Electromagnetic Induction→Electromagnetic Induction — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

What is the value of inductance L for which the current is a maximum in a series LCR circuit with $\text{C}=10\mu\text{F}$ and $\omega=1000_\text{s}^{-1}$?
→

A group of bright and faint stars is called

(a) Galaxy

(b) Comet

(c) Black hole

(d) Constellation
→

A bright star is indicated to have a brightness magnitude of – 5 compared to a star of brightness zero magnitude. It means that this star compared to the reference star of zero brightness is           

(a) 100 times less bright

(b) 5 times more bright

(c) 5 times less bright

(d) 100 times more bright
→
Which of the following happens when a body is charged positively?
→

Assertion   :   In photoemissive cell inert gas is used.

Reason       : Inert gas in the photoemissive cell gives greater current.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.
→
A particle is projected in a plane perpendicular to a uniform magnetic field. The area bounded by the path described by the particle is proportional to:
→

Finger prints are observed by the use of:

→

A parallel plate capacitor has a plate separation of 0.01 mm and use a dielectric (whose dielectric strength is 19 KV/mm) as an insulator. The maximum potential difference that can be applied to the terminals of the capacitor is

(a) 190 V

(b) 290 V

(c) 95 V

(d) 350 V
→
Following operations can be performed on a capacitor:
X - connect the capacitor to a battery of emf $\in.$
Y - disconnect the battery.
Z - reconnect the battery with polarity reversed.
W - insert a dielectric slab in the capacitor.
→

The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is

(a) 49o to the horizontal

(b) 90o with the vertical

(c) 49o to the vertical

(d) Along the horizontal
→