CBSE Class 12 Physics Sample Paper 2019 (1)

CBSE Class 12 Physics Sample Paper 2019 (1). It’s always recommended to practice as many sample papers as possible before the examinations. Students can download the sample papers and also question papers of previous years to practice and score better marks in examinations. Refer to other links too for more sample papers. 

Q.1. Force between two point charges kept at a distance d apart in air is F. If these charges are kept at the same distance in water, how does the electric force between them change?

Q.2.  Two wires of equal lengths, one of copper and the other of manganin have the same resistance. Which wire will be thicker?

Q.3.  A beam of electrons projected along + x-axis, experiences a force due to a magnetic field along the y-axis. What is the direction of the magnetic field?

Q.4.  Why can’t transformer be used to step up d.c. voltage?

Q.5.  For the same angle of incidence, the angles of refraction in three different media A, B and C are 150, 250 and 350 respectively. In which medium will the velocity of light be minimum?

Q.6.  A test charge q is moved without acceleration from A to C along the path from A to B and then from B to C in electric field E as shown in the figure.  

i) Calculate the potential difference between A and C

ii) At which point (of the two) is the electric potential more and why?

Q.7.  A cell of e.m.f. ‘E’ and internal resistance ‘r’ is connected across a variable resistor ‘R’. Plot a graph showing variation of terminal voltage ‘v’ of the cell versus the current ‘I’. Using this graph, show how the e.m.f. of the cell and its internal resistance can be determined.

Q.8.  Two substances A and B have their relative magnetic permeabilities slightly greater than and less than unity respectively. What do you conclude about the magnetic nature (dia, para or ferromagnetic) of A and B ? Will their susceptibilities be positive or negative?

Q.9.  A metallic rod of length ‘L’ is rotated with angular frequency of ‘w’ with one end hinged at the centre and the other end at the circumference of a circular metallic ring of radius L,about an axis passing through the centre and perpendicular to the plane of the ring.

A constant and uniform magnetic field B parallel to the axis is present everywhere. Deduce the expression for the emf between the centre and the metallic ring.

OR

The circuit arrangement of the figure shows that when an a.c. passes through the coil A, the current starts flowing in the coil B.

a) Name the principle involved.

b) Mention two factors on which the current produced in the coil B depends.

Please click the link below to download CBSE Class 12 Physics Sample Paper 2019 (1).