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General
Easy
Question
The vertical limbs of a U shaped tube are filled with a liquid of density 
upto a height h on each side. The horizontal portion of the U tube having length 2h contains a liquid of density 2. The U tube is moved horizontally with an accelerator g/2 parallel to the horizontal arm. The difference in heights in liquid levels in the two vertical limbs, at steady state will be
- None of these
The correct answer is:
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A wire as a parabola y = a 
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A wire as a parabola y = a is located in a uniform magnetic field of inductance B, the vector B being perpendicular to the plane xy. At the moment t = 0 a connector starts translation wise from the parabola apex with a constant acceleration w to find the emf of electromagnetic induction in the loop this formed as a function of y
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In a series R-L-C circuit, the frequency of the source is half of the resonance frequency. The nature of the circuit will be
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In figure, a lamp P is in series with an iron-core inductor L. When the switch S is closed, the brightness of the lamp rises relatively slowly to its full brightness than it would do without the inductor. This is due to
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In figure, the switch S is closed so that a current flows in the iron-core inductor which has inductance L and the resistance R. When the switch is opened, a spark is obtained in it at the contacts. The spark is due to
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An inductor L, a resistance R and two identical bulbs B1 and B2 are connected to a battery through a switch S as shown in the figure. The resistance of coil having inductance L is also R. Which of the following statement gives the correct description of the happenings when the switch S is closed?
An inductor L, a resistance R and two identical bulbs B1 and B2 are connected to a battery through a switch S as shown in the figure. The resistance of coil having inductance L is also R. Which of the following statement gives the correct description of the happenings when the switch S is closed?
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A circuit element is placed in a closed box. At time t=0, constant current generator supplying a current of 1 amp, is connected across the box. Potential difference across the box varies according to graph shown in figure. The element in the box is :
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A conducting rod PQ of length L = 1.0 m is moving with a uniform speed v = 20 m/s in a uniform magnetic field B = 4.0 T directed into the paper. A capacitor of capacity C = 10 
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Two circular coils A and B are facing each other as shown in figure. The current i through A can be altered
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A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced currents in wires AB and CD are
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In the shown AC circuit phase different between currents 
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The current I, potential difference 
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The current I, potential difference across the inductor and potential difference across the capacitor in circuit as shown in the figure are best represented vectorially as
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are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.
are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.
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In the circuit diagram shown, 
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. The effective current through the source is
In the circuit diagram shown, and R = 100 . The effective current through the source is
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The effective value of current 
is:
The effective value of current is:
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The direct current which would give the same heating effect in an equal constant resistance as the current shown in figure, i.e. the r.m.s. current, is
The direct current which would give the same heating effect in an equal constant resistance as the current shown in figure, i.e. the r.m.s. current, is
physics-General
