CLASS XII – SAMPLE PAPER PHYSICS Time allowed : 3 hours Max. Marks : 70 General Instructions: All questions are compulsory There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 […]
If the waves are coherent, then the resultant intensity is given by I = I1 + I2 + 2 √(I1 I2 Cos Θ), where Θ is the phase difference between two waves. For the constructive interference the value of Θ = 0°, so that the Cos Θ = 1 and for the destructive interference the value of Θ = […]
“What is the difference between dot product and cross product?” [The question was posted by Salman)
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Is potential difference is directly proptional to resistance? (atanu asks) Answer: For a constant current, the potential difference is directly proportional to the resistance included in the circuit. For a given conductor at constant temperature, resistance is a constant and the potential difference across it is directly proportional to the current passed through it.
How graphs are made for different processes like isothermal, isobaric, isochoric & adiabatic? Answer: Hope you are talking about the PV diagrams. The difference between isothermal and adiabatic curve is that the adiabatic curve is more steeper than an the isothermal curve. In isobaric, P remains constant and hence will give a horizontal line (if […]
What is difference between electric field and magnetic field?
Hope that the following link will help you find the answer.
Difference between Electric and Magnetic fields
SET -1 In a series LCR circuit, the voltages across an inductor, a capacitor and a resisitor are 30 V, 30V and 60 V respectively. What is the phase difference between the applied voltage and the current in the circuit? Ultraviolet radiations of different frequencies f1 and f2 are incident on two photosensitive materials having […]