A uniform magnetic field parallel to the plane of paper, exsisted in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by figure.
1. 
A uniform magnetic field parallel to the plane of paper, exsisted in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by figure.
1.
Subtopic: Magnetic Materials |
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The current i and voltage V graphs for a given metallic wire at two different temperatures T1 and T2 are shown in the figure. It is concluded that
1. T1>T2
Subtopic: Derivation of Ohm's Law |
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The internal resistance of primary cell is 4Ω. It generates a current of 0.2 A in an external resistance of 21Ω. The rate at which chemical energy is consumed is providing the current is
1. 0.42 J/s
Subtopic: Heating Effects of Current |
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. 
There are N cells in the circuit of figure. The emf and internal resistance of each cell is E and rrespectively. The points A and B in the circuit divide the curit into n and (N-n) cells. The current in the circuit is
1. E/r
Subtopic: Grouping of Cells |
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The earth’s magnetic field at a certain place has ahorizontal component of 0.3 G and total strength 0.5 G. Find angle of dip in tan-1.
1. δ =tan-1
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The two spherical conductor A and B. of radii a and b(b>a) are placed concentrically in air. The two arc connected by a copper wire as shown in figure. The equivalent capacitance of the system is
1. 
Subtopic: Capacitance |
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