CBSE Class 12 Physics Question Paper SA1 2012 (1)

CBSE Class 12 Physics Question Paper SA1 2012 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

1. What does q1 + q2 = 0 signify in electrostatics ? 

2. In Bohr's model of hydrogen atom, the electron moves around the nucleus in a circular orbit of radius 5x10–11 m. Its time period is 1.5x10–16 second. Find current associated with the electron motion 3.Two heater wires of equal lengths are first connected in series and then in parallel. Find ratio of heat produced in two cases.

4. How will the magnetic field intensity at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved ? 

5. Define eddy current. 

6. What is the ratio of speed of gamma rays and radiowaves in vacuum ? 

7. Prove that energy stored in a parallel plate capacitor is 1/2 CV2.

8.Give any two limitation of Ohm's Law.

9.Derive microscopic form of Ohm's law. 

10. Define the terms magnetic dip and magnetic declination. 

11. The two resistors 400 Ω and 800 Ω are connected in series with 6 volt battery. It is desired to measure the current in the circuit. An ammeter of 10 Ω resistance is used for this purpose. What will be the reading in the ammeter ? Similarly, if a voltmeter of 10,000 Ω resistance is used to measure the potential difference across the 400 Ω resistor what will be the reading in voltmeter ?

Please click the link below to download pdf file of CBSE Class 12 Physics Question Paper SA1 2012 (1).