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CBSE Physics Previous Question Paper All Indai (Comptt.) 1998

1. What is the limit of frequency up to which signals using a sky wave can be transmitted? Answer 2. Draw the graph showing the variation of See beck coefficient with temperature of the hot junction. Answer 3. What is the power factor of an …

CBSE Physics Previous Question Paper All Indai (Comptt.) 1997

Q. 1. Sketch two equipotential surfaces for a point charge. Answer Q. 2. If the length of a wire conductor is doubled by stretching it, keeping the p.d. across it constant, by what factor does the drift speed of electrons change? Answer Q. 3. Give two factors on which the temperature of …

CBSE Physics Previous Question Paper All India 1997

Q. 1. Give the ratio of velocities of light rays of wavelengths 4000 A and 8000 A in vacuum. Answer Q. 2. A student obtains resistances of 3, 4, 12 and 16 ohms using only two metallic resistance wires either separately or joined together. What is the value of resistance of each …

CBSE Physics Previous Question Paper All India 1998

Q. 1. In a medium the force of attraction between two point electric charges, distance’d’ apart, is F. What distance apart should these be kept in the same medium so that the force between them becomes 3F? Answer Q. 2. Name the experiment which established the quantum nature of electric …

CBSE Physics Previous Question Paper Dehli 1997

Q. 1. Horizontal component of Earth’s magnetic field at a place is √3 times the vertical component. What is the value of angle of dip at this place? Answer Q. 2. Force between two point electric charges kept at a distance d apart in air is F. If these charges are kept …

CBSE Physics Previous Question Paper Dehli (Comptt.) 1997

Q. 1. Sketch the electric lines of force for two positive charges Q1 and Q2 (Q1 > Q2) separated by a distance d. Answer Q. 2. Why is a voltmeter always connected in parallel with a circuit element across which voltage is to be measured? Answer Q. 3. What is …

CBSE Physics Previous Question Paper Delhi (Comptt.) 1998

1. How does the luminosity of a star vary with its mass? Answer 2. State two factors by which the range of transmission of signals by a T.V. tower can be increased. Answer 3. The ratio of the horizontal component to the resultant magnetic field of earth at a given place is 1/√2. What …

CBSE Physics Previous Year Question Paper Dehli 1998

Q. 1. Name the physical quantity whose SI unit is Coulomb/Volt. Answer Q. 2. Write the frequency limit of visible range of electromagnetic spectrum in kHz. Answer Q. 3. How does the conductance of a semi-conducting material change with rise in temperature? Answer Q. 4. The force …

CBSE Physics Previous Year Question Paper Dehli 1998

Q. 1. Name the physical quantity whose SI unit is Coulomb/Volt. Answer Q. 2. Write the frequency limit of visible range of electromagnetic spectrum in kHz. Answer Q. 3. How does the conductance of a semi-conducting material change with rise in temperature? Answer Q. 4. The force …

CBSE Physics Sample Question Paper Foreign 1997

Q. 1. An electron and a proton are free to move in a given electric field. Will the acceleration experienced by them be equal or different? Answer Q. 2. Is the potential difference across the two p.n. junctions in the given circuit same or different? Answer Q. 3. …

CBSE Physics Sample Question Paper Foreign 1998

Q. 1. Define ‘Electrochemical Equivalent’ of a substance. Answer Q. 2. The equivalent capacitance of the combination between A and B in the given figure is 15 μF. Calculate the capacitance of capacitor C. Answer Q. 3. Name the electromagnetic radiations used for studying crystal structures of solids. Answer Q. 4. In a series …

CBSE Physics Model Practice Question Paper- 10

1. Write the condition in which a transistor is saturated. Answer 2. Why a magnetic field is used to deviate cathode rays in a cathode ray tube and not an electric field? Answer 3. For a 60 W lamp, the luminous flux is 600 lumen. …

CBSE Physics Model Practice Question Paper- 9

1. A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. What is the torque needed to maintain the needle in this position? Answer …

CBSE Physics Model Practice Question Paper- 8

1. Name the electromagnetic radiation produced from transition in outer energy levels of an atom. Answer 2. What is the effect of doping in a pure semiconductor? Answer 3. Draw graphs showing variation of output voltage with current in load for unregulated power supply and regulated power supply. Answer 4. …

CBSE Physics Model Practice Question Paper- 7

1. In a Young’s double slit experiment the intensity of bright fringe is I. If the slits have the same width what is intensity due to one slit only? Answer 2. Which temperature is higher in the graphs? Image Answer 3. …

CBSE Physics Model Practice Question Paper- 6

1. Name the physical quantity which has Am2 as unit for measurement. Answer 2. Differentiate between ionization energy and work function of a metal. Answer 3. Can we accelerate a charge in a magnetic field? Answer 4. Define voltage sensitivity of a galvanometer. Answer 5. …

CBSE Physics Model Practice Question Paper- 5

1. Write relation between E and V at a point in an electrostatic field. Answer 2. What is the resistance of an intrinsic semiconductor at 0 K? Answer 3. Two inductances carry currents that vary with time as shown. In which the induced e.m.f. will …

CBSE Physics Model Practice Question Paper- 4

1. A capacitor of capacitance C is charged to a potential V. What is the net flux of electric field through a closed surface enclosing the capacitor? Answer 2. Write the equation of a plane electromagnetic wave travelling along the 7-axis. Answer 3. Name a …

CBSE Physics Model Practice Question Paper- 3

1. What is the capacitance between the point A and B. Image Answer 2. What is the equivalent resistance of the circuit? Image Answer 3. Do all thermocouples have neutral temperature? Answer 4. If the horizontal and vertical components of earth’s magnetic field are equal at a place what is angle of dip? Answer 5. When the switch …

CBSE Physics Model Practice Question Paper- 2

1. In a plane at 45° to the magnetic meridian the apparent dip is 30°. What is the true dip? …

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