1. A Semi conductor acts as an insulator at – 0 K
2 The laser which helped to prove that the velocity of light is the same in all directions
is – He-Ne laser
3. The value of the magnetic permeability of free space µo = 4 π ×10-7 H/m
4 The velocity V of a sound wave of frequency (n) and wave length (λ) is given by – v = nλ
5 In a p-type semi conductor majority carriers are – holes
6 1 Calorie = 4.2 J
7 Deep Water region behaves as a – Rarer medium
8 The units of Intensity of magnetisation are – Tesla
9 β- Particles are – Electrons
10 Neptunium series is a – 4n+1 series
11 The radius of nucleus of an atom is – 10-13cm
12 A transformer works on the principle of – Mutual induction
13 The unit of B in S.I. System is – N/A-m
14 Refining and extraction of metals is – Metallurgy
15 The least count of a screw gauge when the pitch of the screw is 0.5 mm and the total no. of divisions on the head is ‘100’ is – 0.005 mm
16 An example for diamagnetic substance is – Bi
17 Distance between two successive nodes is- λ/2
19 The energy gap is highest in the case of – insulator
20 Which one of the following is not a diamagnetic substance- Iron
21 In a stationary wave, the points at which the displacement is minimum are called – Nodes
22 Mass Energy relationship is E= mC2
23 Quantum theory was proposed by – Max Planck
24 The unit of electric current is – Ampere
25 The unit of ‘pole srength’ in S.I. units is – Ampere – metre
AP – SSC Physical Sciences
AP 10th Class Physical Sciences – Important Questions
Read the answers for the following important questions.
1) Sketch the diagram of Rutherfords’ atomic model and label its parts. (5 Marks)
2) Draw a neat diagram showing the extraction of Magnesium from its
ore and label its various Parts. (5 M)
3) Explain Nuclear reactor and how the chain reaction is controlled.
(4 M)
4) Describe the experiment to find the velocity of sound in air by resonating air columns. (4 M)
5) Compare the properties of α, β and γ- radiations. (4 M)
6) How do you classify solids on the basis of electrical behaviour? explain. (4 M)
7) Explain Pauli’s exclusive principle with examples. (4 M)
8) Explain s-p overlap with examples. (4 M)
9) State the Postulates o Bohr’s model and write the two main
defects of this model. (4 M)
10) Define a drug- what are the characteristics of an ideal drug. (4 M)
11) Differentiate between mass and weight of a body. (2 M)
12) What is Doping? (2 M)
13) What are Hardware and software of a computer. (2 M)
14) Define the terms.
a) Magnetic susceptibility and
b) Magnetic Permeability. (2 M)
15) Calculate the number of moles of NaOH present in 750 ml of 0.4 M solution. (2 M)
16) Define and give two examples for each
I) cosmetic and II) Pharmaceuticals. (2 M)
17) Draw the shapes of
1) H2O and PCl3 molecules. (2 M)
18) Mention the methods of manufacture of cement. (2 M)