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  4. The nature of graph between the separation of the slits and fringe width in case of Young’s double slit experiment is

Q. The nature of graph between the separation of the slits and fringe width in case of Young’s double slit experiment is

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Solution:

$\beta \propto \frac{1}{ d }$

Questions from KCET 2022

1. A truck of mass $0.5$ Ton is moving with a speed of $6\, ms ^{-1}$. Sand is poured at the rate of $10\, Kg$ per minute. How much force is needed to keep it moving with the same speed?

2. A horizontal force $F$ is applied on a block of weight $W$ to hold against a vertical wall. The minimum value of force needed to hold the block if the coefficient of friction of the surface is $\mu$

3. A bird is inside a wire cage hung from a spring balance. The spring balance reading is $R_{1}$ when the bird is flying and $R_{2}$ when it is at rest inside the cage. Which of the following is correct?

4. 6. An ideal heat engine gives out heat at $77^{\circ} C$ to have a $30 \%$ of efficiency. The temperature of the source is

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