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Easy
Question
In the circuit shown, X is joined to Y for a long time, and then X is joined to Z. The total heat produced in 
The correct answer is:
Related Questions to study
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In the LR circuit shown, what is the variation of the current I as a function of time? The switch is closed at time t = 0 sec.
In the LR circuit shown, what is the variation of the current I as a function of time? The switch is closed at time t = 0 sec.
physics-General
physics-
In the circuit shown, the cell is ideal. The coil has an inductance of 4H and zero resistance. F is a fuse of zero resistance and will blow when the current through it reaches 5A. The switch is closed at t = 0. The fuse will blow :
In the circuit shown, the cell is ideal. The coil has an inductance of 4H and zero resistance. F is a fuse of zero resistance and will blow when the current through it reaches 5A. The switch is closed at t = 0. The fuse will blow :
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physics-
Two resistors of 10 
and 20 and an ideal inductor of 10 H are connected to a 2 V battery as shown. The key K is inserted at time t = 0. The initial (t = 0) and final 
currents through battery are
Two resistors of 10 and 20 and an ideal inductor of 10 H are connected to a 2 V battery as shown. The key K is inserted at time t = 0. The initial (t = 0) and final currents through battery are
physics-General
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The network shown in the figure is part of a complete circuit. If at a certain instant, the current I is 5A and it is decreasing at a rate of 
The network shown in the figure is part of a complete circuit. If at a certain instant, the current I is 5A and it is decreasing at a rate of
physics-General
physics-
The current in the given circuit is increasing with a rate a = 4 amp/s. The charge on the capacitor at an instant when the current in the circuit is 2 amp will be :
The current in the given circuit is increasing with a rate a = 4 amp/s. The charge on the capacitor at an instant when the current in the circuit is 2 amp will be :
physics-General
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Two identical inductance carry currents that vary with time according to linear laws (as shown in figure). In which of two inductance is the self induction emf greater?
Two identical inductance carry currents that vary with time according to linear laws (as shown in figure). In which of two inductance is the self induction emf greater?
physics-General
physics-
The ratio of time constant in charging and discharging in the circuit shown in figure is
The ratio of time constant in charging and discharging in the circuit shown in figure is
physics-General
physics-
In the adjoining circuit, initially the switch S is open. The switch ‘S’ is closed at t = 0. The difference between the maximum and minimum current that can flow in the circuit is
In the adjoining circuit, initially the switch S is open. The switch ‘S’ is closed at t = 0. The difference between the maximum and minimum current that can flow in the circuit is
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physics-
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
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
physics-General
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
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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
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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
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