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General
Easy
Question
Two short bar magnets of equal dipole moments ‘M’ each are fastened perpendicular at their centers as shown in figure. The magnitude of the magnetic field at ‘P’ at a distance d from their common center as shown in figure is
The correct answer is:
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A magnet of length 2L and moment ‘M’ is axially cut into two equal halves ‘P’ and ‘Q’. The piece ‘P’ is bent in the form of semi circle and ‘Q’ is attached to it as shown. Its moment is
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The variation of magnetic susceptibility 
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The variation of magnetic susceptibility with temperature for a diamagnetic substance is best represented by
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A 3 volt battery with negligible internal resistance is connected in circuit as shown in the figure. The current I in the circuit will be.
A 3 volt battery with negligible internal resistance is connected in circuit as shown in the figure. The current I in the circuit will be.
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In the circuit dissipation is 150 W. Then R is
In the circuit dissipation is 150 W. Then R is
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A wire has a no uniform cross-section as shown. A steady current is flowing through it. Then the drift speed of the electrons
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Find the potential difference between A and B
Find the potential difference between A and B
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Five resistances are connected as shown in figure. The effective resistance between the points A and B is
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The effective resistance between the terminals P and Q in following circuit is
The effective resistance between the terminals P and Q in following circuit is
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Three bulbs B1, B2 and B3 are connected to the mains as shown in figure. How will the incandescence of the bulb B1 be affected, if one of the bulbs B2 or B3 is disconnected from the circuit?
Three bulbs B1, B2 and B3 are connected to the mains as shown in figure. How will the incandescence of the bulb B1 be affected, if one of the bulbs B2 or B3 is disconnected from the circuit?
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In a metre bridge, the gaps are closed by two resistances P and Q the balance point is obtained at 40 cm. When Q is shunted by a resistance of 10
, the balance point shifts to 50 cm. The values of P and Q are
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The current in branch AB is
The current in branch AB is
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In the given circuit, each resistance is 10. The equivalent resistance between A and D is
In the given circuit, each resistance is 10. The equivalent resistance between A and D is
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In the network shown,
In the network shown,
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In the circuit shown,
In the circuit shown,
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Find the equivalent resistance between P and Q
Find the equivalent resistance between P and Q
physics-General
