CBSE Class 12 Physics Guess Paper First term 2013

Find CBSE class 12th Biology Guess paper for the first term examination. Question has been framed as per the syllabus covered in the first term examination. It is very important to prepare the first term examination as it is a part of board exam preparation

Some question of this Guess paper are given here

Q. A carrier wave of peak voltage 12V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75%?

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Q. Why do magnetic lines of force prefer to pass through ferromagnetic substance than through air?

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Q. What is the nature of the magnetic field in a moving coil galvanometer?

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Q. What is the angle of dip at a place where the horizontal and vertical components of the earth’s magnetic field are equal?

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Q. You are given ‘n’ resistors each of resistance ‘r’. These are first connected to get minimum possible resistance. In the second case it is connected to get maximum possible resistance. Compute the ratio between the minimum and the maximum values of resistance so obtained.

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Q. Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? ATV transmitting antenna is 81m tall. How much service areas can it cover if the receiving antenna is at the ground level?

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