Physics-
General
Easy
Question
A triangular wire frame (each side = 2m) is placed in a region of time variant magnetic field having The magnetic field is perpendicular to the plane of the triangle. The base of the triangle AB has a resistance 1 W while the other two sides have resistance 2 each. The magnitude of potential difference between the points A and B will be
- 0.4 V
- 0.6 V
- 1.2 V
- None
The correct answer is: 0.4 V
Related Questions to study
physics-
Figure shows a uniform magnetic field B confined to a cylindrical volume and is increasing at a constant rate. The instantaneous acceleration experienced by an electron placed at P is
Figure shows a uniform magnetic field B confined to a cylindrical volume and is increasing at a constant rate. The instantaneous acceleration experienced by an electron placed at P is
physics-General
physics-
A copper rod AB of length L, pivoted at one end A, rotates at constant angular velocity , at right angles to a uniform magnetic field of induction B. The e.m.f developed between the mid point C of the rod and end B is
A copper rod AB of length L, pivoted at one end A, rotates at constant angular velocity , at right angles to a uniform magnetic field of induction B. The e.m.f developed between the mid point C of the rod and end B is
physics-General
physics-
A ring of resistance 10, radius 10cm and 100 turns is rotated at a rate 100 revolutions per second about a fixed axis which is perpendicular to a uniform magnetic field of induction 10mT. The amplitude of the current in the loop will be nearly
A ring of resistance 10, radius 10cm and 100 turns is rotated at a rate 100 revolutions per second about a fixed axis which is perpendicular to a uniform magnetic field of induction 10mT. The amplitude of the current in the loop will be nearly
physics-General
physics-
A metal disc rotates freely, between the poles of a magnet in the direction indicated. Brushes P and Q make contact with the edge of the disc and the metal axle What current, if any, flows through R?
A metal disc rotates freely, between the poles of a magnet in the direction indicated. Brushes P and Q make contact with the edge of the disc and the metal axle What current, if any, flows through R?
physics-General
physics-
When a ‘J’ shaped conducting rod is rotating in its own plane with constant angular velocity w, about one of its end P, in a uniform magnetic field directed normally into the plane of paper) then magnitude of emf induced across it will be
When a ‘J’ shaped conducting rod is rotating in its own plane with constant angular velocity w, about one of its end P, in a uniform magnetic field directed normally into the plane of paper) then magnitude of emf induced across it will be
physics-General
physics-
In the circuit shown in figure, a conducting wire HE is moved with a constant speed V towards left. The complete circuit is placed in a uniform magnetic field perpendicular to the plane of the circuit directed in inward direction. The current in HKDE is
In the circuit shown in figure, a conducting wire HE is moved with a constant speed V towards left. The complete circuit is placed in a uniform magnetic field perpendicular to the plane of the circuit directed in inward direction. The current in HKDE is
physics-General
physics-
An equilateral triangular loop ADC of some finite magnetic field as shown in the figure. At time t = 0, side DC of loop is at edge of the magnetic field. Magnetic field is perpendicular to the paper inwards (or perpendicular to the plane of the coil). The induced current versus time graph will be as
An equilateral triangular loop ADC of some finite magnetic field as shown in the figure. At time t = 0, side DC of loop is at edge of the magnetic field. Magnetic field is perpendicular to the paper inwards (or perpendicular to the plane of the coil). The induced current versus time graph will be as
physics-General
physics-
A conducting rod PQ of length 5 m oriented as shown in figure is moving with velocity without any rotation in a uniform magnetic field Tesla. Emf induced in the rod is
A conducting rod PQ of length 5 m oriented as shown in figure is moving with velocity without any rotation in a uniform magnetic field Tesla. Emf induced in the rod is
physics-General
physics-
There is a uniform magnetic field B normal to the xy plane. A conductor ABC has length parallel to the x-axis, and length parallel to the y-axis. ABC moves in the xy plane with velocity The potential difference between A and C is proportional to
There is a uniform magnetic field B normal to the xy plane. A conductor ABC has length parallel to the x-axis, and length parallel to the y-axis. ABC moves in the xy plane with velocity The potential difference between A and C is proportional to
physics-General
physics-
A rod closing the circuit shown in figure moves along a U shaped wire at a constant speed v under the action of the force F. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate F if the rate of heat generation in the circuit is Q
A rod closing the circuit shown in figure moves along a U shaped wire at a constant speed v under the action of the force F. The circuit is in a uniform magnetic field perpendicular to the plane. Calculate F if the rate of heat generation in the circuit is Q
physics-General
physics-
A conducting rod of length l moves with velocity a direction parallel to a long wire carrying a steady current I. The axis of the rod is maintained perpendicular to the wire with near end a distance r away as shown in the fig. Find the emf induced in the rod.
A conducting rod of length l moves with velocity a direction parallel to a long wire carrying a steady current I. The axis of the rod is maintained perpendicular to the wire with near end a distance r away as shown in the fig. Find the emf induced in the rod.
physics-General
physics-
A conducting rod moves with constant velocity u perpendicular to the long, straight wire carrying a current I as shown compute that the emf generated between the ends of the rod.
A conducting rod moves with constant velocity u perpendicular to the long, straight wire carrying a current I as shown compute that the emf generated between the ends of the rod.
physics-General
physics-
Two conducting rings P and Q of radii r and 2r rotate uniformly in opposite directions with centre of mass velocities 2v and v respectively on a conducting surface S. There is a uniform magnetic field of magnitude B perpendicular to the plane of the rings. The potential difference between the highest points of the two rings is
Two conducting rings P and Q of radii r and 2r rotate uniformly in opposite directions with centre of mass velocities 2v and v respectively on a conducting surface S. There is a uniform magnetic field of magnitude B perpendicular to the plane of the rings. The potential difference between the highest points of the two rings is
physics-General
physics-
A square metal loop of side 10 cm and resistance 1 is moved with a constant velocity partly inside a magnetic field of 2 Wb m–2, directed into the paper, as shown in the figure. This loop is connected to a network of five resistors each of value 3 . If a steady current of 1 mA flows in the loop, then the speed of the loop is
A square metal loop of side 10 cm and resistance 1 is moved with a constant velocity partly inside a magnetic field of 2 Wb m–2, directed into the paper, as shown in the figure. This loop is connected to a network of five resistors each of value 3 . If a steady current of 1 mA flows in the loop, then the speed of the loop is
physics-General
physics-
The figure shows an isosceles triangle wire frame with apex angle equal to . The frame starts entering into the region of uniform magnetic field B with constant velocity v at t= 0. The longest side of the frame is perpendicular to the direction of velocity. If i is the instantaneous current through the frame then choose the alternative showing the correct variation of i with time.
The figure shows an isosceles triangle wire frame with apex angle equal to . The frame starts entering into the region of uniform magnetic field B with constant velocity v at t= 0. The longest side of the frame is perpendicular to the direction of velocity. If i is the instantaneous current through the frame then choose the alternative showing the correct variation of i with time.
physics-General