Physics-
General
Easy
Question
A uniform but time varying magnetic field is present in a circular region of radius R. The magnetic field is perpendicular and into the plane of the loop and the magnitude of the field is increasing at a constant rate 
.There is a straight conducting rod of length 2R placed as shown in figure .The magnitude of induced emf across the rod is
The correct answer is:
Considering a square loop as shown, emf across the loops 
magnitude of emf across one side 
Related Questions to study
physics-
In the arrangement shown in the figure, uniform magnetic field B is upward to the plane of paper. Connecter AB is smooth and conducting, having mass m and length l. Initially spring has extension X0. Spring is non-conducting (neglect induction in spring). Connector is released at t = 0. Maximum charge on the capacitor is
In the arrangement shown in the figure, uniform magnetic field B is upward to the plane of paper. Connecter AB is smooth and conducting, having mass m and length l. Initially spring has extension X0. Spring is non-conducting (neglect induction in spring). Connector is released at t = 0. Maximum charge on the capacitor is
physics-General
physics-
Time constant of L-R circuit will be
Time constant of L-R circuit will be
physics-General
physics-
A large number of infinite long thin wires each carrying current i0 are kept along z-axis. Then the value of magnetic field ‘B’, at any point ‘P’ at a distance ‘x’ from O varies as
A large number of infinite long thin wires each carrying current i0 are kept along z-axis. Then the value of magnetic field ‘B’, at any point ‘P’ at a distance ‘x’ from O varies as
physics-General
physics-
Two fixed long conducting wires cross each other perpendicularly so that they do not actually touch but are close to each other as shown in the figure. Equal current i exist in each wire in the directions indicated. In what region(s) will there be some points with zero net magnetic field?
Two fixed long conducting wires cross each other perpendicularly so that they do not actually touch but are close to each other as shown in the figure. Equal current i exist in each wire in the directions indicated. In what region(s) will there be some points with zero net magnetic field?
physics-General
Maths-
Period of f (x) = sin x + tan 
+ sin 
+ tan 
+ ... + sin 
+ tan 
is -
Period of f (x) = sin x + tan + sin + tan + ... + sin + tan is -
Maths-General
physics-
A container is filled with water
up to a height of 33.25 cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water level. The focal length of the mirror is
A container is filled with water up to a height of 33.25 cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water level. The focal length of the mirror is
physics-General
biology
An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reactinons 
A mutant failed to survive on this medium but grew when nutrient B was added to it. Which gene of this mutant was defective
An organism is able to live on a culture medium containing nutrient A, by the enzyme catalysed reactinons A mutant failed to survive on this medium but grew when nutrient B was added to it. Which gene of this mutant was defective
biologyGeneral
biology
DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
DNA fragments separated by gel electrophoresis are shown. Mark the correct statement
biologyGeneral
biology
The basic procendure involved in the sythesis of recombinant DNA molecule is depicted. The mistake in the procedure is
The basic procendure involved in the sythesis of recombinant DNA molecule is depicted. The mistake in the procedure is
biologyGeneral
biology
Which of the following in not produced by E.Coil in the lactose
Which of the following in not produced by E.Coil in the lactose
biologyGeneral
physics-
An object is placed in front of a convex mirror of focal length 
Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
An object is placed in front of a convex mirror of focal length Find the maximum and minimum distance of two object from the mirror such that the image is real and magnified.
physics-General
biology
The Ti plasmid, is often used for making transgenic plants. This plasmid is found in
The Ti plasmid, is often used for making transgenic plants. This plasmid is found in
biologyGeneral
physics-
The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?
The figure shows the stress-strain graph of a certain substance. Over which region of the graph is Hook’s Law obeyed ?
physics-General
biology
Which is true for repressible operon
Which is true for repressible operon
biologyGeneral
physics-
Two wires of the same material (Young’s modulus Y) and same length 
but radii R and 2R respectively are joined end to end and a weight 
is suspended from the combination as shown in the figure. The elastic potential energy in the system is
Two wires of the same material (Young’s modulus Y) and same length but radii R and 2R respectively are joined end to end and a weight is suspended from the combination as shown in the figure. The elastic potential energy in the system is
physics-General
