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while studing the diode limitters

i found two examples i solved the first one but i couldn't with the second

1 -

2-

in the first i know that the diode while be forward biased in the negative half of the signal

so the negative half will be limitted to -0.7 v

and the V peak output will be = [(RL/(RL+R1)]*Vinput = 9.09v

but i don't know what will be the difference between the first and the second problem !!

so please help me guys ...Thanks :)