Question
A conducting loop is placed in a uniform magnetic field with its plane perpendicular to the field. An emf is induced in the loop if:
  1. It is translated.
  2. It is rotated about its axis.
  3. It is rotated about a diameter.
  4. It is deformed.

Answer

  1. It is rotated about a diameter.
  2. It is deformed.
​​​​​​​Explanation:
þ An emf is induced in the loop is it is rotated about a diameter
þ An emf is induced in the loop if it is deformed.

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

Similar questions

Which of the following best describe the electromagnetic induction?
A 100 watt bulb working on 200 volt and a 200 watt bulb working on 100 volt have(a) Resistances in the ratio of 4 : 1(b) Maximum current ratings in the ratio of 1 : 4 (c) Resistances in the ratio of 2 : 1(d) Maximum current ratings in the ratio of 1 : 2
 
 
 
 
What is the C.G.S. unit of charge?
Assertion :   Moon is seen as it partly reflects the sun light falling on it
Reason     :  Moon is a satellite of earth. It does not emit light of its own(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 permanent magnet has the capacity to attract:
A magnet is suspended in such a way that it oscillates in the horizontal plane. It makes $20$ oscillations per minute at a place where dip angle is $30^{\circ}$ and $15$ oscillations per minute at a place where dip angle is $60^{\circ}$. The ratio of total earth's magnetic field at the two places is
Thirteen resistances each of resistance $R$ ohm are connected in the circuit as shown in the figure below.  The effective resistance between $A$ and $B$ is
A spring-mass system occillates in a car. if the car accelerates on a horizontal road, the frequency of oscillation will:
  1. Increase.
  2. Decrease.
  3. Remain same.
  4. Become zero.
Which impurity is doped in Si to form N-type semi-conductor?(a) Al(b) B(c) As (d) None of these
       
If half-life of a substance is 3.8 days and its quantity is 10.38 gm. Then substance quantity remaining left after 19 days will be(a) 0.151 gm(b) 0.32 gm(c) 1.51 gm(d) 0.16 gm