Maharashtra State BoardHSC Science (Electronics) 11th
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HSC Science (Electronics) 11th - Maharashtra State Board Important Questions for Physics

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Physics
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The distance between two bodies is doubled. How is the magnitude of the gravitational force between them affected?

Appears in 1 question paper
Chapter: [0.04] Laws of Motion
Concept: Centre of Gravity

Define emissive power and coefficient of emmision of a body.

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

Two copper spheres of radii 6 cm and 12 cm respectively are suspended in an evacuated enclosure. Each of them are at a temperature 15°C above the surroundings. The ratio of their rate of loss of heat is.................

  1. 2:1
  2. 1:4
  3. 1:8
  4. 8:1
Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

The dimensions of emissive power are

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

A pinhole is made in a hollow sphere of radius 5 cm whose inner wall is at temperature 727oC. Find the power radiated per unit area. [Stefan’s constant σ = 5.7 x 10-8 J/m2 s K4 , emissivity (e) = 0.2]

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

Compute the temperature at which the r.m.s. speed of nitrogen molecules is 832 m/s. [Universal gas constant, R = 8320 J/k mole K, molecular weight of nitrogen = 28.]

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

The light from the Sun is found to have a maximum intensity near the wavelength of 470 nm. Assuming the surface of the Sun as a black body, the temperature of the Sun is _____________.

[Wien's constant b = 2 .898 x l0- 3mK]

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

A metal ball cools from 64 °C to 50 °C in 10 minutes and to 42 °C in next 10 minutes. The ratio of rates of fall of temperature during the two intervals is _______.

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

The susceptibility of magnesium at 300 K is 2.4 x 10-5. At what temperature will the susceptibility increase to 3.6 x 10-5?

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

1000 tiny mercury droplets coalesce to form a bigger drop. In this process, temperature of the drop _______ .

(A) increases

(B) may increase or decrease

(C) decreases

(D) does not change

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

A body cools from 62°C to 54°C in 10 minutes and to 48°C in the next 10 minutes. Find the temperature of the surroundings.

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

The susceptibility of magnesium at 300K is 1.2 x 10-5. At what temperature will the susceptibility increase to 1.8 X 10-5?

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

The substance which allows heat radiations to pass through is _______.

(A) iron

(B) water vapour

(C) wood

(D) dry air

Appears in 1 question paper
Chapter: [0.07] Thermal Properties of Matter
Concept: Heat and Temperature

Explain: ‘How is a rainbow formed’?

Appears in 1 question paper
Chapter: [0.09] Optics
Concept: Some Natural Phenomena Due to Sunlight
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