Physics-
General
Easy
Question
The magnetic flux across a loop of resistance 
is given by 
. How much current is induced in the loop after 0.2 sec
The correct answer is:
Magnetic flux, 
The induced 
mf is 
At, 
The induced current is 
Related Questions to study
Physics-
A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere with part of the loop outside the field, as shown in figure. The induced emf is
A conducting square loop of side L and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane of the loop exists everywhere with part of the loop outside the field, as shown in figure. The induced emf is
Physics-General
Physics-General
Physics-
At a place the value of horizontal component of the earth’s magnetic field 
is 
. A metallic rod 
of length 
placed in east-west direction, having the end 
towards east, falls vertically downward with a constant velocity of 
. Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends
At a place the value of horizontal component of the earth’s magnetic field is . A metallic rod of length placed in east-west direction, having the end towards east, falls vertically downward with a constant velocity of . Which end of the rod becomes positively charged and what is the value of induced potential difference between the two ends
Physics-General
Physics-
A rectangular, a square, a circular and an elliptical loop, all in the 
plane, are moving out of a uniform magnetic field with a constant velocity 
. The magnetic field is directed along the negative 
-axis direction. The induced 
, during the passage of these loops, out of the field region, will not remain constant for
A rectangular, a square, a circular and an elliptical loop, all in the plane, are moving out of a uniform magnetic field with a constant velocity . The magnetic field is directed along the negative -axis direction. The induced , during the passage of these loops, out of the field region, will not remain constant for
Physics-General
Physics-
The armature of dc motor has 
resistance. It draws current of 1.5 ampere when run by 
dc supply. The value of back e.m.f. induced in it will be
The armature of dc motor has resistance. It draws current of 1.5 ampere when run by dc supply. The value of back e.m.f. induced in it will be
Physics-General
Physics-
The oscillating frequency of a cyclotron is 10 MHz. If the radius of its dees is 0.5 m, the kinetic energy of a proton, which is accelerated by the cyclotron is
The oscillating frequency of a cyclotron is 10 MHz. If the radius of its dees is 0.5 m, the kinetic energy of a proton, which is accelerated by the cyclotron is
Physics-General
Physics-
The flux linked with circuit is given by
The graph between time 
and induced emf 
will be a
The flux linked with circuit is given by The graph between time and induced emf will be a
Physics-General
Maths-
For the curve 
if the subnormal at any point is a constant, then 
is equal to
For the curve if the subnormal at any point is a constant, then is equal to
Maths-General
Maths-
The maximum slope of the curve 
is
The maximum slope of the curve is
Maths-General
Maths-
The point at which the tangent to the curve 
is parallel to 
, will be
The point at which the tangent to the curve is parallel to , will be
Maths-General
Maths-
If a differentiable function 
has a relative minimum at 
, then the function 
has a relative minimum at for
If a differentiable function has a relative minimum at , then the function has a relative minimum at for
Maths-General
Maths-
Let and 
be differentiable for 
such that 
Let there exist a real number 
in 
such that 
then the value of 
must be
Let and be differentiable for such that Let there exist a real number in such that then the value of must be
Maths-General
Maths-
If the curves 
and 
intersect at right angle then the value of 
is equal to
If the curves and intersect at right angle then the value of is equal to
Maths-General
Maths-
The function 
is increasing in the interval
The function is increasing in the interval
Maths-General
Maths-
The values of 
in order that 
decreases for all real values of 
, is given by
The values of in order that decreases for all real values of , is given by
Maths-General
Maths-
If the ratio of base radius and height of a cone is 
and percentage error in radius is 
then the error in its volume is
If the ratio of base radius and height of a cone is and percentage error in radius is then the error in its volume is
Maths-General
