Physics-
General
Easy
Question
A small circular wire loop of radius a is located at the centre of a much larger circular wire loop of radius b as shown above
Both loops are coaxial and coplanar. The larger loop carries a time (t) varying current 
cos 
t, where 
and are constants. The magnetic field generated by the current in the large loop induces in the small loop an emf that is approximately equal to which of the following.
The correct answer is:
Related Questions to study
physics-
A conducting circular ring and a conducting elliptical ring both are moving pure translationally in a uniform magnetic field of strength B as shown in figure on a horizontal conducting plane then potential difference between top most points of circle and ellipse is :
A conducting circular ring and a conducting elliptical ring both are moving pure translationally in a uniform magnetic field of strength B as shown in figure on a horizontal conducting plane then potential difference between top most points of circle and ellipse is :
physics-General
physics-
A current flows through a rectangular conductor in the presence of uniform magnetic field B pointing out of the page as shown. Then the potential difference VP – VQ is equal to. (assume charge carriers in the conductor to be positively charged moving with a drift velocity of v)
A current flows through a rectangular conductor in the presence of uniform magnetic field B pointing out of the page as shown. Then the potential difference VP – VQ is equal to. (assume charge carriers in the conductor to be positively charged moving with a drift velocity of v)
physics-General
physics-
The plane of a square loop of wire with edge length a = 0.2 m is perpendicular to the earth's magnetic field BE at a point where BE = 15 
T. The total resistance of the loop and the wires connecting it to the galvanometer is 0.5 
. If the loop is suddenly collapsed (such that area of the loop becomes zero) by horizontal forces as shown, the total charge passing through the galvanometer is :
The plane of a square loop of wire with edge length a = 0.2 m is perpendicular to the earth's magnetic field BE at a point where BE = 15 T. The total resistance of the loop and the wires connecting it to the galvanometer is 0.5 . If the loop is suddenly collapsed (such that area of the loop becomes zero) by horizontal forces as shown, the total charge passing through the galvanometer is :
physics-General
physics-
Figure shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 1 /m. Position of the conducting rod at t = 0 is shown. A time t dependent magnetic field B = 2t Tesla is switched on at t = 0
At t = 0, when the magnetic field is switched on, the conducting rod is moved to the left at constant speed 5 cm/s by some external means. The rod moves remaining perpendicular to the rails. At t = 2s, induced emf has magnitude.
Figure shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 1 /m. Position of the conducting rod at t = 0 is shown. A time t dependent magnetic field B = 2t Tesla is switched on at t = 0
At t = 0, when the magnetic field is switched on, the conducting rod is moved to the left at constant speed 5 cm/s by some external means. The rod moves remaining perpendicular to the rails. At t = 2s, induced emf has magnitude.
physics-General
physics-
A particle is projected up an inclined as shown in figure. For maximum range over the inclined plane, the value of 
should be
A particle is projected up an inclined as shown in figure. For maximum range over the inclined plane, the value of should be
physics-General
physics-
The velocity-time graph of a body moving along a straight line is as follows:
The displacement of the body in 5 s is
The velocity-time graph of a body moving along a straight line is as follows:
The displacement of the body in 5 s is
physics-General
physics-
The velocity-time graph of a body is given below.
The maximum acceleration in 
is
The velocity-time graph of a body is given below.
The maximum acceleration in is
physics-General
physics-
From the velocity – time graph given of a particle moving in a straight line, one can conclude that
From the velocity – time graph given of a particle moving in a straight line, one can conclude that
physics-General
physics-
A particle a is projected form the ground with an initial velocity of 10 m/s at an angle of 60° with horizontal. From what height h should an another particle B be projected horizontal with velocity 5 m/s so that both the particles collides at point C if both are projected simultaneously 
A particle a is projected form the ground with an initial velocity of 10 m/s at an angle of 60° with horizontal. From what height h should an another particle B be projected horizontal with velocity 5 m/s so that both the particles collides at point C if both are projected simultaneously
physics-General
physics-
A large rectangular box falls vertically with an acceleration a. A toy fixed at A and aimed towards C fires a particle P. Which of the following statement is false?
A large rectangular box falls vertically with an acceleration a. A toy fixed at A and aimed towards C fires a particle P. Which of the following statement is false?
physics-General
physics-
If the displacement (s) and time (t) graph of two moving particles A and B is shown in the figure, then which of following is incorrect.
If the displacement (s) and time (t) graph of two moving particles A and B is shown in the figure, then which of following is incorrect.
physics-General
physics-
Figure shows the graph of acceleration of particle as a function of time. The maximum speed of the particle is (particle starts from rest)
Figure shows the graph of acceleration of particle as a function of time. The maximum speed of the particle is (particle starts from rest)
physics-General
physics-
The velocity-time plot is shown in figure. Find the average speed in time interval 
to 
during the period
The velocity-time plot is shown in figure. Find the average speed in time interval to during the period
physics-General
physics-
The circular divisions of shown screw gauge are 
. It moves 
on main scale in one rotation. The diameter of the ball is
The circular divisions of shown screw gauge are . It moves on main scale in one rotation. The diameter of the ball is
physics-General
physics-
A rod of a paramagnetic substance is placed in a non-uniform magnetic field. Which of the following figure shows its alignment in the field ?
A rod of a paramagnetic substance is placed in a non-uniform magnetic field. Which of the following figure shows its alignment in the field ?
physics-General
