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ICSE physics

Question
ICSEENIPH12029799
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A point charge of 5 x 10-6 C experiences a force of 2 x 10-3 N when kept in a uniform electric field of intensity E. Find E.

Solution

Electric field Intensity,
E = fraction numerator 2 space straight x space 10 to the power of negative 3 end exponent over denominator 5 space straight x space 10 to the power of negative 6 end exponent end fraction space equals space fraction numerator 2 space x 10 cubed over denominator 5 end fraction equals 400 space V divided by m

Question
ICSEENIPH12029800
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Which conservation principle is involved in Kirchoffs first law of electric circuits?

Solution

Law of Conservation of charge.

Question
ICSEENIPH12029801
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Write an expression of magnetic flux density ‘B’ at a point in end - on position or an axial position of a magnetic dipole, (Derivation not required.)

Solution

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Magnetic flux density at the axial position


Error converting from MathML to accessible text.

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Question
ICSEENIPH12029802
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In a moving coil galvanometer, what is meant by a radial magnetic field?

Solution

When the magnet are grounded concave, the fields lines then pass radially by across the pole pieces such a field is known as radial field. 

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Question
ICSEENIPH12029803
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Variation of alternating current T with time ‘t’ is shown in the graph below :


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What is the rms value of this current?

Solution

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