10 STANDARD REDUCED PORTION QUIZ SCIENCE PHYSICS

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PREPARED BY SANGEETHA KURUMANDUR ERODE(DT) PH:9750284462

NAME *

SCHOOL *

1) Inertia of a body depends on *

1 point

a) weight of the object

b) acceleration due to gravity of the planet

c) mass of the object

d) Both a & b

3) Newton’s III law is applicable *

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a) for a body is at rest

b) for a body in motion

c) both a & b

d) only for bodies with equal masses

4) Plotting a graph for momentum on the X-axis and time on Y-axis. slope of momentum-time graph gives *

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a) Impulsive force

b) Acceleration

c) Force

d) Rate of force

6) The unit of ‘g’ is m s-2. It can be also expressed as *

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a) cm s-1

b) N kg-1

c) N m2 kg-1

d) cm2 s-2

7) One kilogram force equals to *

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a) 9.8 dyne

b) 9.8 × 104 N

c) 98 × 104 dyne

d) 980 dyne

8) The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be____kg *

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a) 4 M

b) 2M

C) M/4

d) M

10) To project the rockets which of the following principle(s) is /(are) required? *

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a) Newton’s third law of motion

b) Newton’s law of gravitation

c) law of conservation of linear momentum

d) both a and c

1. The refractive index of four substances A, B, C and D are 1.31, 1.43, 1.33, 2.4 respectively. The speed of light is maximum in *

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a) A

b) B

c) C

d) D

2. Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens *

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a) f

b) 2f

c) infinity

d) between f and 2f

3. A small bulb is placed at the principal focus of a convex lens. When the bulb is switched on, the lens will produce *

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a) a convergent beam of light

b) a divergent beam of light

c) a parallel beam of light

d) a coloured beam of light

5. A convex lens forms a real, diminished point sized image at focus. Then the position of the object is at *

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a) focus

b) infinity

c) at 2f

d) between f and 2f

7. In a myopic eye, the image of the object is formed *

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a) behind the retina

b) on the retina

c) in front of the retina

d) on the blind spot

8. The eye defect ‘presbyopia’ can be corrected by *

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a) convex lens

b) concave lens

c) convex mirror

d) Bi focal lenses

9. Which of the following lens would you prefer to use while reading small letters found in a dictionary? *

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a) A convex lens of focal length 5 cm

b) A concave lens of focal length 5 cm

c) A convex lens of focal length 10 cm

d) A concave lens of focal length 10 cm

10. If VB, VG, VR be the velocity of blue, green and red light respectively in a glass prism, then which of the following statement gives the correct relation? *

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a) VB = VG = VR

b) VB > VG >VR

c) VB < VG < VR

d) VB < VG > VR

2. If a substance is heated or cooled, the change in mass of that substance is *

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a) positive

b) negative

c) zero

d) none of the above

4. Temperature is the average ___________ of the molecules of a substance *

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a) difference in K.E and P.E

b) sum of P.E and K.E

c) difference in T.E and P.E

d) difference in K.E and T.E

5. The quantity of thermal energy absorbed by a body for 1 kelvin increase in its temperature is known as *

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a)pressure capacity

b)heat capacity

c)kinetic energy

d)potential energy

1. Which of the following is correct? *

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a) Rate of change of charge is electrical power.

b) Rate of change of charge is current.

c) Rate of change of energy is current.

d) Rate of change of current is charge.

2. SI unit of resistance is *

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a) mho

b) joule

c) ohm

d) ohm meter

3. In a simple circuit, why does the bulb glow when you close the switch? *

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a)The switch produces electricity.

b) Closing the switch completes the circuit.

c) Closing the switch breaks the circuit.

d)The bulb is getting charged.

4. Kilowatt hour is the unit of *

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a) resistivity

b) conductivity

c) electrical energy

d) electrical power

1. When a sound wave travels through air, the air particles *

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a) vibrate along the direction of the wave motion

b) vibrate but not in any fixed direction

c) vibrate perpendicular to the direction of the wave motion

d) do not vibrate

3. The frequency, which is audible to the human ear is *

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a) 50 kHz

b) 20 kHz

c) 15000 kHz

d) 10000 kHz

6. The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes? *

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a) speed

b) frequency

c) wavelength

d) none of these

7. Velocity of sound in the atmosphere of a planet is 500 m s-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be *

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a) 17 m

b) 50 m

c) 75 m

d) 25 m

1. Man-made radioactivity is also known as_____________ *

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a. Induced radioactivity

b. Spontaneous radioactivity

c. Artificial radioactivity

d. a & c

2. Unit of radioactivity is _____________ *

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a. rontgen

b. curie

c. becquerel

d. all the above

3. Artificial radioactivity was discovered by____________ *

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a. Bequerel

b. Irene Curie

c. Roentgen

d. Neils Bohr

4. In which of the following, no change in mass number of the daughter nuclei takes place i) α decay ii) β decay iii) γ decay iv) neutron decay *

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a. (i) is correct

b (ii) and (iii) are correct

c (i) & ( iv) are correct

d (ii) & (iv) are correct

5. ____________ isotope is used for thetreatment of cancer.

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a. Radio Iodine

b. Radio Cobalt

c. Radio Carbon

d. Radio Nickel

Clear selection

6. Gamma radiations are dangerous because *

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a. it affects eyes & bones

b. it affects tissues

c. it produces genetic disorder

d. it produces enormous amount of heat

7. _____________ aprons are used to protectus from gamma radiations *

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a. Lead oxide

b. Iron

c. Lead

d. Aluminium

8. Which of the following statements is/are correct? i. α particles are photons ii. Penetrating power of γ radiation is very low iii. Ionization power is maximum for α rays iv. Penetrating power of γ radiation is very high *

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a. (i) & (ii) are correct

b. (ii) & (iii) are correct

c. (iv) only correct

d. (iii) & (iv) are correct

10. In the nuclear reaction 6X12 undergoes α decay and gives zYA , the value of A & Z. *

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a. 8, 6

b. 8, 4

c. 4, 8

d. cannot be determined with the given data

1. Which of the following has the smallest mass? *

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a. 6.023 × 10 power 23 atoms of He

b.1 atom of He

c. 2 g of He

d.1 mole atoms of He

2. Which of the following is a triatomic molecule? *

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a. Glucose

b.Helium

c. Carbon dioxide

d. Hydrogen

3. The volume occupied by 4.4 g of CO2 at S.T.P *

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a. 22.4 litre

b.2.24 litre

c. 0.24 litre

d.0.1 litre

5. Which of the following represents 1 amu? *

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a. Mass of a C – 12 atom

b.Mass of a hydrogen atom

c. 1/12th of the mass of a C – 12 atom

d.Mass of O – 16 atom

8. In the nucleus of 20 Ca 40, there are *

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a. 20 protons and 40 neutrons

b. 20 protons and 20 neutrons

c. 20 protons and 40 electrons

d. 40 protons and 20 electrons

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