2) The effective length of a magnet is the distance between its____
3) The _____ of magnetic domains in a substance causes magnetisation.
4) Charge on an electron is____
5) Current in a circuit is measured by ____and it is connected in circuit in _____
6) A rheostat is used to_____
7) The SI unit of resistance is_____
8) When a rod is held near the disc of a positively charged gold leaf electroscope, the divergence of leaf increases. The charge on rod is____
9) Two like charges ____and ____attract.
10) A body which does not transmit electric charge from one end to the other is called an____because it has a deficiency of ____, whereas a body that transmits electric charge is called a ____because it has____ free electrons.
11) The fundamental particles of an atoms are (i)_____(ii)____(iii)_____. Out of these particles___ has negative charge,____ has positive charge and ___ is neutral.
12) In a neutral atom, the number of____ is equal to the number of protons.
13) Wave motion involves transport of _____
14) Light waves are___ but sound waves are ____
15) In a transverse mechanical wave, the particles of the medium vibrate in a direction _____.
16) In a longitudinal mechanical wave, the particles of the medium vibrate in a direction _____.
17) At crest, the displacement is ____and at troughs , the displacement is ____.
18) There is no pressure variation in____ wave.
19) Sound waves cannot travel through____but require a _____.
20) Sound is produced due to the_____ in the medium.
21)! Wavelength × frequency= _____
22) Velocity of sound increases by ms⁻¹ for each degree Celsius ____in temperature.
23) The SI unit of frequency is ______.
24) The image formed by the convex mirror is always _____.
25) the image formed by a concave mirror can be____ or_____.
26) The radius of curvature of a spherical mirror is____ of its focal length.
27) A shaving mirror is _____and rear view mirror in automobiles is_____.
28) The image formed by a plane mirror is of same size, erect and____.
29) If the angle between two plane mirror is 50°, the number of images for a point object in between them is_______.
30) In a Periscope, two plane mirrors are placed______to each other.
31) light is a form of____and it travels in air with a speed of _____
32) In the process of conduction, the molecules_____ their position.
33) Heat is transferred ____by a convection current.
34) Water is a _____conductor of heat.
35) Good absorbers are_____radiators( or Emmmitors) of heat.
36) highly polished surfaces are____ reflectors but____ absorbers.
37) The upper fixed point on the Fahrenheit scale is marked as____
38) A temperature of 50°C corresponds to _____on the Kelvin scale.
39) The lowest possible temperature which can be attained is ___°C.
40) 100° on the Celsius scale corresponds to____° on the Fahrenheit scale.
41) In a clinical thermometer there is a ____in the stem just about the bulb.
42) The distance between the lower fixed point and the upper fixed point is divided into ____ equal parts in the Fahrenheit scale.
43) On Kelvin scale, absolute zero is the temperature at which____ and it corresponds to ____ on the Celsius scale.
44) When a substance is cooled, the average kinetic energy of its molecules___
45) On hurting, the change in length of a rod is directly proportion to____ and____
46) The unit for the coefficient of cubical expansion is_____
47) A device used to control temperature is called____.
48) A given mass of water will have least volume at_____°C.
49) Two rods A and B of same material and of length 1m and 2m respectively, are heated from 0°C to 100°C. The rod____ elongates more than the rod____.
50) The density of water is maximum at_____°C.
51) α= _____ × β= ______ × γ, where α, β γ, are the co-efficients of linear, superficial and cubical expansion, of a substance respectively.
52) The moment of force= force × ____
53) The SI unit of the moment of a force is______
54) Force= mass × ____
55) 1 kgf= _____N.
56) The Newton is the unit of____
57) 1 N = 0.1 kg × ____ms⁻².
58) One newton force will produce in a 1 kg mass an acceleration of____.
59) A body is thrown vertically upward with a velocity 1000 m/s. While it returns , the velocity at the starting point will be____.
60) A body is thrown vertically upwards . At the highet point its velocity will be____ and its acceleration will be____.
61) A train travels from a station A to another station B with a velocity of 100 kmph and returns from the station B to station A with a velocity of 80 kmph. Its average velocity for the whole journey is ____ and its average speed is____.
62)
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