2022 EXAMINATION

MOST LIKELY

ICSE QUESTION

BANK PHYSICS CLASS IX

OBJECTIVE + SUBJECTIVE

KEY FEATURES Chapterwise & Categorywise MCQs with Detailed Explanations VSA, SA, LA Included Questions Based on New Pattern Solutions Provided by Panel of Experts Categorized to Facilitate Quick Last-Minute Revision

(a) (b) (c) (d)

(a) (b) (c) (d)

ten million light years million light years hundred million light years ten thousand million light years ten thousand million light years

1 nm = 10–3 m 1 nm = 10–9 m 1 nm = 10–6 m 1 nm = 10–12 m 1 nm = 10–9 m

It is the distance travelled by light in vacuum in one year

(a) Solar day (c) Solar year Sidereal day

Sidereal day is the time taken by the earth to complete one rotation about its own axis with respect to a distant star.

(a) Leap year (c) Lunar month (a) The distance at which an arc of length 1 Å subtends an angle of 1 second of arc (b) The mean distance of the Earth from the Sun (c) Small practical unit of distance used for measuring nuclear size (d) None of the above The mean distance of the Earth from the Sun

(a) Largest unit of distance used in astronomy (b) It is wavelength of light (c) It is a small practical unit to measure larger distances (d) It is the distance travelled by light in vacuum in one year

(b) Sidereal day (d) Tropical year

(b) Tropical year (d) Shake

(a) The least count of Vernier is equal to the difference between the values of one main scale division and one Vernier scale division. (b) The least count of Vernier is equal to the addition of the values of one main scale division and one Vernier scale division. (c) The least count of Vernier is equal to the multiplication of the values of one main scale division and one Vernier scale division. (d) None of the above

(a) The largest measurement that can be taken accurately with it. (b) The average measurement that can be taken accurately with it. (c) The smallest measurement that can be taken accurately with it. (d) The middle of the measurement that can be taken accurately with it. (a) Backlash error (c) Negative error Backlash error

(b) Positive error (d) None of these

(a) equal to the sum of the zero mark of the main scale and the marks coinciding with the Vernier scale. (b) equal to the length between the zero mark of the main scale and the zero mark of the Vernier scale. (c) equal to the average of the both readings of main scale and Vernier scale. (d) none of the above

(a) Distance of oscillation made in one second. (b) The maximum displacement of the bob from its mean position on either side, is called the amplitude of oscillation. (c) The minimum displacement of the bob from its mean position on either side is called the amplitude of oscillation. (d) None of the above

(a) It is the distance moved by screw along its axis in one complete rotation of its head. (b) It is the linear distance moved by its screw along the main scale when the circular scale is rotated by one division on it. (c) It is the angular displacement of screw along the main scale when the circular scale is rotated by one division on it. (d) None of the above

1.66 × 10–27 kg (a) Use of double prefixes is conventionally prohibited. (b) Symbols for the units other than commemorating great scientists are not written as capital letters. (c) M is not a symbol for 106 (d) Because of some reason other than those mentioned above Use of double prefixes is conventionally prohibited.

(a) time (c) frequency distance

(a) 1 minute (c) 15 minutes

(a) 9.46 light year (c) 1.26 light year 3.26 light year

(b) 3.26 light year (d) 4.96 light year

(a) one digit (c) three digits two digits

(b) two digits (d) four digits

(a) 0.001 mm (c) 0.05 mm 0.02 mm

(b) 0.01 mm (d) 0.02 mm

(b) distance (d) angular momentum

(b) 4 minutes (d) 56 minutes

(a) Halved (c) Tripled Halved

(b) Doubled (d) Quadrupled

(a) 10–3 cm (c) 10–7 cm 10–4 cm

(b) 10–4 cm (d) 10–8 cm

(a) 2 × 1030 kg (c) 1.66 × 10–27 kg

(b) 6.02 × 1026 kg (d) 1.96 × 1011 kg

(a) it can be used to make both inside and outside measurements over a range of sizes (b) it is more accurate

(c) it is easier and quick to use (d) none of the above it can be used to make both inside and outside measurements over a range of sizes (a) for measuring depth (b) for measuring the internal diameter (c) for measuring length correct upto 1 mm (d) for measuring length of a rod for measuring the inner diameter

(a) m

(b) cm –1

(c) cm

(d) none of these

(a) to mark main scale and base line (b) to mark circular scale (c) to read length correct upto 1 mm (d) to advance the screw

(a) Positive error (c) Backlash error Least count

(b) Negative error (d) Least count

(a) Increases (c) Didn't change

(b) Decreases (d) None of these

(a) (b) (c) (d)

for measuring depth for measuring the inner diameter for measuring length to fix the measuring body

(a) negative error

(b) positive error

(c) backlash error

(d) none of these

(a) From point of suspension to half the length of string (b) From point of suspension upto bob (c) It is the distance of the point of oscillation ( ., the centre of gravity of the bob) from the point of suspension. (d) None of the above

(a) value of (c) value of

(b) value of T (d) none of these

g

(a) – 0.4 mm

(b) – 0.6 mm

(c) – 0.3 mm

(d) – 0.2 mm

(a) 25.0 mm

(b) 25.4 mm

(c) 28.6 mm

(d) 22.6 mm

g

l

l

(a) 0.1 mm

(b) 0.2 mm

(c) 0.01 mm

(d) 0.2 cm

0.2 mm

(a) 24 mm (c) 26.8 mm

(a) 0.02 cm (c) 0.01 cm

(b) 25.4 mm (d) 24.2 mm

(a) 2.30 mm

(b) 2.29 mm

(c) 2.36 mm

(d) 2.41 mm

(b) 0.03 cm (d) none of these

(a)

T2 is constant

(b) /T2 is constant (c) (T2 + ) is constant (d) None of these (a) 3.41 mm (c) 3.46 mm

(b) 6.41 mm (d) 3.51 mm

l

(a) 1.95 × 10–40 m3 (c) 3.95 × 10–30 m3

(b) 2.95 × 10–30 m3 (d) 2.95 × 10–40 m3

r

(a) 0.0154 cms–2 (c) 0.1540 cms–2 0.0154 cms–2

(b) 0.0254 cms–2 (d) 0.2254 cms–2

s (a) 0.2067 parsec (c) 0.1067 parsec 0.3067 parsec

(b) 0.3067 parsec (d) 0.4067 parsec

(a) (c) (a) (b) (c) (d)

1

(b)

1

(d)

1

6.67 × 10–12 cm3 s–2 g–1 6.67 × 10–9 cm3 s–2 g–1 6.67 × 10–10 cm3 s–2 g–1 6.67 × 10–8 cm3 s–2 g–1 6.67 × 10–8 cm3 s–2 g–1 n 1 n

n 1 n

n 1 n

(a) N

(b) N – 1

(c)

(d)

n 1 n

(a) 2 m (c) 20 m m

n

(b) 5 m (d) 50 m

(a) 5.3 cm

(b) 5.32 cm

(c) 5.320 cm

(d) 5.3200 cm

(a) 0.58 cm

(b) 3.58 cm

(c) 7.58 cm

(d) 6.58 cm

(a) 7.367 cm (c) 7.167 cm (d) 7.567 cm

(b) 7.467 cm (d) 7.567 cm

m

(a) 0.026 cm (c) 0.52 cm

(a) 0.002 cm (c) 0.01 cm

(b) 0.005 cm (d) 0.052 cm

(b) 0.001 cm (d) 0.02 cm

Correct length= Length recorded + correction = 7.58 + (– 0.0125) = 7.58 – 0.0125 = 7.5675 cm = 7.567 cm

Least count (L.C.) = =

= 0.005 mm

Least count = 0.0005 cm (a) 0.2585 cm

(b) 0.3586 cm

(c) 0.3584 cm

(d) 0.1585 cm

(a) 0.2585 cm

Main scale reading = 5 mm = 0.5 cm (C.S.D.) circular scale reading = 34 divisions Observed diameter of wire = Main scale reading + (a) 0.001 cm (c) 0.0005 cm (c) 0.0005 cm

L.C. × C.S.D.

(b) 0.0005 mm (d) 0.001 mm

= 0.5 + 0.0005 × 34 = 0.5 + 0.0170 = 0.5170 cm Radius of wire =

Number of circular scale divisions = 200 pitch = 1 mm

What do you mean by the term measurement? Measurement is a standard determination of the magnitude of any physical quantity or comparison between a known and an unknown quantity of the same nature. Define the term unit. Unit is a quantity of constant magnitude which is used to measure the magnitudes of other quantities of the same nature. What do you understand by a physical quantity? The quantity that can be measured directly or indirectly is termed as physical quantity. What do you understand by fundamental quantities? Fundamental quantities are the quantities which are independent of any other quantity , they can neither be changed nor be related to any other fundamental quantity. : length, mass, time. What do you mean by derived quantities? Derived quantities are the quantities which are dependent on a fundamental quantity ., they can be expressed in terms of fundamental quantities. E.g: density, area, volume. Define 1 kilogram on an atomic scale. On an atomic scale, one kilogram is equivalent to the mass of 5.018 × 1025 atoms of C-12 carbon isotope.

=

= 0.2585 cm

Define the following terms: (i) One metre (iii) One second. (ii) One kilogram (i) It is the length of path travelled by light in vacuum during a time interval of 1 of a second. 299, 792, 458 (ii)

When a force of one Newton produces an acceleration of 1 ms-2 in a body, then the mass of body is said to be one kilogram. (iii) It is the time duration of 9, 192, 631, 770 periods of certain radiations emitted by Cesium-133 atom. Define One kelvin temperature. One kelvin is defined as the fraction

1 273.16

of

the thermodynamic temperature of the triple point of water. What do you mean by a solar day? The time taken by earth to complete one rotation about its own axis so that sun appears in the same position in the sky is called a solar day. What do you understand by the term mean solar day?

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