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Average value of current over a half cyc...

Average value of current over a half cycle is?
a) `0.67I_m`
b) `0.33I_m`
c) `6.7I_m`
d)`3.3I_m`

Text Solution

Verified by Experts

Let , F= contact force between `m_A and m_B`
and f= force exerted by experimenter
` F+ m_A a f=0 `
`rarr F=f=m_A a `………..i
Now, `m_B.a-F=0`
`rarr F=m_Ba` ……ii.

Form equation i. and equation ii whe have
`rarr f= m_Aa=m_Ba`
`rarr f=m_Ba+m_A a`
`rarr =a (m_B_m_A)`
`rarr f= F/m_B (m_B+m_A)`
` =F(1+ m_A/m_B)`
`[since a= F/m_B]`
`:.` Force exerted by experimenter
`=F(1+m_A/m_B)`.
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