Practice Physics ncert - general science mcq Online Quiz (set-2) For All Competitive Exams

Q-1)   Space wave propagation is:

1. tropospherical propagation
2. sky wave propagation
3. line of sight propagation

Which of the above statement(s) is/are correct?

(a) 1 and 3

(b) 2 only

(c) 1 only

(d) 2, 3 and 4

Q-2)   ________ is used as a fuel in space ships.

(a) Alcohol

(b) Petrol

(c) Hydrogen

(d) Diesel

Q-3)   Consider the following statements in respect of India advanced satellite INSAT–4A:

1. INSAT-4A was launched in December, 2005 from New Mexico.
2. The European Commercial Launch Service Provider Arianespace was associated with the launch of INSA T-4A.
3. Tata-Sky; a digital cable service provider; is associated with DTH television broadcasting service from INSA T 4A.

Which of the statements given above are correct?

(a) 1 and 2

(b) 2 and 3

(c) 1, 2 and 3

(d) 1 and 3

Q-4)   Which among the following statements are the requirements of good source of energy?

1. It should do a large amount of work per unit volume or mass.
2. It should be easily accessible.
3. It should be easy to store and transport.
4. It should be economical.

(a) A, B, C

(b) B, C, D

(c) A, B

(d) All of thesegenerator.

Q-5)   Consider the following statements :

1. Collation is a process of sorting at receiving end
2. Encoding of signal is required for modulation at transmitting end
3. Long wave broadcast transmitter are used for temperate countries

Which of the above statements are correct?

(a) 2 and 3

(b) 1 and 3

(c) 1 and 2

(d) 1, 2 and 3

Q-6)   Repeaters used in telephone links are:

(a) Oscillators

(b) Amplifiers

(c) Rectifiers

(d) Transformers

Q-7)   Telephony is an example of ________ mode of communication

(a) broadcast

(b) both (a) and (c)

(c) point-to-point

(d) None of these

Q-8)   The phenomenon of high and low tides and the difference in sea levels give________.

(a) Tidal energy

(b) Wave energy

(c) Hydel energy

(d) Thermal energy

Q-9)   Propane is used instead of natural gas on many farms and in rural areas. Why is propane often used instead of natural gas?

(a) It’s portable

(b) It’s cleaner

(c) It’s safer

(d) It’s cheaper

Q-10)   Which of the following statements is/are correct ?

1. Pure Si doped with trivalent impurities gives a p-type semiconductor
2. Majority carriers in a n-type semiconductor are holes
3. Minority carriers in a p-type semiconductor are electrons
4. The resistance of intrinsic semiconductor decreases with increase of temperature

(a) I, III and IV

(b) I and IV

(c) I only

(d) II only

Q-11)   The number of atoms per unit cell in a sc, bcc and fcc system are:

(a) 8, 6 and 10 respectively

(b) 1, 4 and 2 respectively

(c) 1, 2 and 4 respectively

(d) 2, 4 and 1 respectively

Q-12)   Geothermal energy is

(a) energy stored as heat in the earth

(b) amount of energy obtained from coal and petroleum inside earth crust.

(c) energy of magma inside the earth crust

(d) amount of minerals obtained from earth crust

Q-13)   Light Emitting Diode (LED) converts

(a) electrical energy into light energy

(b) thermal energy into light energy

(c) light energy into electrical energy

(d) mechanical energy into electrical energy

Q-14)   The neutron, proton, electron and alpha particle are moving with equal kinetic energies. How can the particles be arranged in the increaseing order of their velocities?

(a) proton-electron-neutron-alpha paraticle

(b) electron-proton-neutron-alpha paraticle

(c) alpha particle-neutron-proton- electron

(d) neutron-proton-electron-alpha paraticle

Q-15)   Which one of the following is the correct sequence of the wavelengths of radiations ?

(a) IR > Green > UV > Hard X-rays

(b) UV > Hard X-rays > IR > Green

(c) UV > Green > IR > Hard X-rays

(d) IR > Hard X-rays > Green> UV

Q-16)   Electromagnetic radiations are emitted by which of the following?

(a) Only by bodies at temperature higher than their surroundings

(b) Only by red-hot bodies

(c) Only by radio and television transmitting antennas

(d) By all bodies

Q-17)  

Column I	Column II
A. Hydrogen bomb	1. Fission
B. Atom bomb	2. Fusion
C. Binding energy	3. Critical mass
D. Nuclear reactor	4. Mass defect

Select the correct answer using the codes given below the lists: Code (A) (B) (C) (D)

(a) (A) → (2); (B) → (1); (C) → (4); (D) → (3)

(b) (A) → (3); (B) → (1); (C) → (2); (D) → (4)

(c) (A) → (3); (B) → (2); (C) → (1); (D) → (4)

(d) (A) → (4); (B) → (2); (C) → (3); (D) → (1)

Q-18)   Match the Column I and Column II.

Column I	Column II
A. Isotopes	1. Mass number same but different atomic number.
B. Isobars	2. Atomic number same but different mass number.
C. Isotones	3. Number of nentrons plus number of protons.
D. Nucleons	4. Number of nentrons same but different atomic number.

Select the correct answer using the codes given below the lists:

(a) (A) → (2); (B) → (1); (C) → (4); (D) → (3)

(b) (A) → (1); (B) → (2); (C) → (3); (D) → (4)

(c) (A) → (3); (B) → (1); (C) → (2); (D) → (4)

(d) (A) → (1); (B) → (3); (C) → (2); (D) → (4)

Q-19)   An AM broadcasting station has a vertical telescopic transmitting antenna and a receiver has a vertical telescopic antenna. The receiver will respond to:

(a) Magnetic component of the electromagnetic wave produced by antenna

(b) Both electric and magnetic components of the electromagnetic wave produced by antenna

(c) Electric component of the electromagnetic wave produced by antenna

(d) 50% of both components of the electromagnetic wave produced by antenna

Q-20)   In frequency modulation:

(a) The frequency of modulated wave varies as amplitude of modulating wave

(b) The amplitude of modulated wave varies as amplitude of carrier wave

(c) The amplitude of modulated wave varies as frequency of carrier wave

(d) The frequency of modulated wave varies as frequency of modulating wave.