1.

A charge of 2 xx 10^(-2)C moves at 30 revolutions per second in a circle of diameter 80 cm. The current linked with the circuit is .....

Answer»

0.02 A
20 A
0.60 A
60 A

Solution :0.60 A
`omega = 30 " rad /s "= 60 PI" rad /s"`
`I= (Q)/(T) = (Q omega)/(2 pi)"" [ because T = (2pi)/(omega) ] `
`therefore I = ( 2 XX 10^(-2) xx 60 pi)/(2 pi ) = 60 xx 10^(-2) A = 0.6 A `


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