1.

At a certain place, the vertical component of the earth's magnetic field is 0.4 xx 10^(-4) T and horizontal component is 0.3 xx 10^(-4) T. What will be the total intensity of magnetic field of the earth ?

Answer»

`0.5 xx 10^(-4)` T
`0.5 xx 10^(-2)` T
`0.5 xx 10^(-1)` T
`0.5 xx 10^(0)` T

Solution :`B= SQRT((B_(v)^(2) + B_(H)^(2) )`
`= sqrt((0.4 xx 10^(-4) )^(2) + (0.3 xx 10^(-4) )^(2) )`
`= sqrt((0.16 + 0.09 ) xx 10^(-8))`
`therefore B= 0.5 xx 10^(-4)` T


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