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

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What is space wave propagation?

Appears in 2 question papers
Chapter: [14] Electromagnetic Waves
Concept: Propagation of Electromagnetic Waves

Obtain an expression for torque acting on a rotating body with constant angular acceleration. Hence state the dimensions and SI unit of torque.

Appears in 1 question paper
Chapter: [4] Force
Concept: Torque and Angular Momentum

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

Appears in 1 question paper
Chapter: [4] Force
Concept: Centre of Gravity

Define emissive power and coefficient of emmision of a body.

Appears in 1 question paper
Chapter: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

The dimensions of emissive power are

Appears in 1 question paper
Chapter: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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]

(a) 5800 K

(b) 6050 K

(c) 6166 K

(d) 6500 K

Appears in 1 question paper
Chapter: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

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: [7] Thermal Properties of Matter
Concept: Temperature and Heat

A carbon resistor has coloured bands as shown in Figure 2 below. The resistance of the resistor is:

figure 2

Appears in 1 question paper
Chapter: [11] Current Electricity
Concept: Temperature Dependence of Resistance

Write a short note on surface wave propagation of electromagnetic waves.

Appears in 1 question paper
Chapter: [14] Electromagnetic Waves
Concept: Propagation of Electromagnetic Waves

Line of sight propagation is also called as_________________ .

Appears in 1 question paper
Chapter: [14] Electromagnetic Waves
Concept: Propagation of Electromagnetic Waves

The outermost layer of the earth’s atmosphere is _______.

(A) stratosphere

(B) mesospher

(C) troposphere

(D) ionosphere

Appears in 1 question paper
Chapter: [14] Electromagnetic Waves
Concept: Propagation of Electromagnetic Waves

From earth's surface, ionospheric layer of atmosphere lies between ............

(a) 12 km to 50 km

(b) 50 km to 80 km

(c) 80 km to 400 km

(d) 400 km to 700 km

Appears in 1 question paper
Chapter: [14] Electromagnetic Waves
Concept: Space Communication
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Important Questions for HSC Science (Electronics) 11th Maharashtra State Board Physics. You can further filter Important Questions by subjects and topics. Chapter wise important Questions for 11th Maharashtra State Board. it gets easy to find all 11th important questions with answers in a single place for students. Saving time and can then focus on their studies and practice. Important questions for 11th chapter wise with solutions

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