JKBOSE Class 10th most important MCQS 2023
WRITE DOWN THESE MCQS THESE ARE VERY IMPORTANT FOR YOU.
MOST IMPORTANT MCQS FROM CHAPTER No 9
•ELECTRICITY MCQS
1. A body gets positively charged by loosing :
Neutrons (B) Electrons (C) Protons (D) α -particles
2. A sure test of electrification is :
(A) Attraction (B) Repulsion (C) Friction (D) Induction
3. What is not true for electric charge :
(A) Electric charge is scalar quantity
(B) Charge on a body may be + ve or – ve
(C) S.I. unit of charge is coulomb
(D) One coulomb is charge of one electron
4. All the following statements are correct except :
(A) A body is said to be negatively charged when it has got excess of electrons.
(B) When a body is charged positively, some electrons escape from it.
(C) The presence of moisture in the air reduces its conductivity
(D) None of the above
5. A neutral body has equal amount of :
(A) Both positive and negative charges (B) Only positive charge
(C) Only negative charge (D) No charge at all
6. Law which gives force between two charges is :
(A) Ohm’s law (B) Faraday’s Law (C) Coulomb’s law (D) None of these
7. A charge Q1 exerts some force on a second charge Q2. If a 3rd charge Q3 is brought near then the force of Q1
exerted on Q2.
(A) Will increase
(B) Will decrease
(C) Will remain unchanged
(D) Will increase if Q3
is of the same sign as Q1
and will decrease if Q3
is of opposite sign.
8. 5 C/S is same as :
(A) 5 A (B) 5 mA (C) 5 joule (D) 5 volt
9. Electric current is :
(A) flow of charge per unit time (B) work done per unit time
(C) Resistance per unit time (D) All of these
10. The space around a charge in which some other charge experiences attraction or repulsion, is called its:
(A) Potential (B) Electric field
(C) Electric field intensity (D) Potential difference
11. Give properties of an electric charge.
12. Explain charging by friction.
13. Can charge be created ?
14. Define one Volt.
15. What is unit of electric work in relation to quantity of charge and potential difference ?
• EFFECT OF ELECTRIC CURRENT MCQS
1. When a bar magnet is broken into two pieces :
(A) we will have single pole on each piece (B) each piece will have two like poles
(C) each piece will have two unlike poles (D) each piece will lose magnetism
2. Which one of the following is a non magnetic substance :
(A) Iron (B) Nickel (C) Cobalt (D) Silver
3. The mineral which can attract the pieces of iron towards it is :
(A) Fe2
O3 (B) Fe3
O4 (C) FeO (D) None of these
4. Needle of a magnetic compass always points in :
(A) East direction (B) North west direction
(C) North–South direction (D) Neither A nor B
5. Which of the following can lead to demagnetisation of a magnet :
(A) Hammering (B) Strong heating (C) Aging (D) All are correct
6. Attracting power of a horse shoe magnet can be increased by :
(A) Increasing its length (B) Decreasing the gap between its poles
(C) Keeping it at a cold place (D) None of these
7. Identify the odd one :
(A) Gold (B) Nickel (C) Iron (D) Cobalt
8. The south pole of a freely suspended magnet points to the :
(A) Geographical south (B) Geographical north
(C) Slightly left of geographical north (D) None of these
9. A magnetic compass is placed at a point near a bar magnet. Direction of magnetic field at that point will be:
(A) Tangential to compass needle (B) Normal to compass needle
(C) Towards the south pole of compass needle (D) None of these
10. Magnetic field is :
(A) Scalar (B) Vector
(C) Some times scalar sometimes vector (D) Nothing can be said
11. Give some examples of magnetic & non magnetic substances ?
12. What is directive property of a magnet ?
13. Repulsion is the surest test of magnatisation, comment.
14. What do you mean by magnetic field ?
15. Does a stationary charge produce magnetic field ?
•SOURCE OF ENERGY MCQS
1. Heat liberated per gram of a fuel is called :
(A) Calorific value (B) Mass value
(C) Heating value (D) both (A) and (C)
2. SI unit of calorific value is :
(A) J (B) J/kg (C) kg (D) none of these
3. Which of the following has least calorific value :
(A) alcohol (B) biogas (C) wood (D) coal
4. Which of the following fuel is different from others ?
(A) Water gas (B) Coal gas
(C) Producer gas (D) Coke
5. Most of the fuels are :
(A) Carbon compounds with sulphur (B) Nitrogen compounds with carbon
(C) Carbon compounds with hydrogen (D) None of these
6. Gobar gas is a
(A) solid fuel (B) liquid fuel (C) gas fuel (D) none of these
7. Which of the following is not a solid fuel :
(A) coke (B) coal (C) charcoal (D) kerosene
8. The wind energy map gives information about the :
(A) Cause of wind (B) Intensity of earth quake
(C) Amount of rainfall (D) None of these
9. Energy possessed by flowing water is :
(A) Kinetic energy (B) Potential energy
(C) Heat energy (D) None of these
10. The device used for generating electricity from wind energy is called :
(A) Wind turbine (B) Wind motor
(C) Wind generator (D) Wind mill
11. What is the major difference between renewable SOE and non renewable SOE ?
12. Give any three characteristics of fuel.
13. Sources producing inexhaustible energy are called ………………………………………sources.
14. Sources producing exhaustible energy are called ………………………………………… sources.
15. Explain why coal and petroleum are classified as non renewable SO
. The chief constituent of biogas is :
(A) carbon dioxide (B) ethane (C) methane (D) hydrogen
2. Biogas is produced from biomass by :
(A) anaerobic fermentation (B) fractional distillation
(C) destructive distillation (D) dry distillation
3. Ultimate source of heat on the surface of earth is :
(A) solar energy (B) oceanic energy
(C) wind energy (D) inner temperature of earth crust
4. Limitations of solar energy are :
(A) it is not available during night (B) it is not available uniformly throughout the year
(C) it is not available all the time (D) all of them
5. Indirectly solar energy is harnessed as :
(A) wind energy (B) geothermal energy
(C) hydro energy (D) Both A and C are correct
6. The device which harness solar energy directly is :
(A) coal gas plant (B) natural gas plant
(C) biogas plant (D) solar cell
7. The most common material for making solar cells is :
(A) silicon (B) germanium (C) selenium (D) none of these
8. Which energy is used in solar cells :
(A) electrical (B) chemical (C) solar (D) none
9. Which of the following is not a form of oceanic energy :
(A) Ocean wave energy (B) Tidal energy
(C) Ocean thermal energy (D) Solar energy
10. The energy available due to the difference in the temperature of water at the surface of the ocean and at
deeper levels is called :
(A) tidal energy (B) wind energy (C) solar energy (D) none of these
11. Name a part of India where wind energy is commercially harnessed.
12. State two merits of hydroelectricity.
13. Give two examples of solid, liquid and gaseous fuel.
14. Name the best type of fuel out of solid, liquid and gas.
15. A setup having a large number of windmills is called ……………………………..
1. In a neutral atom ne
and np
represent number of electrons & protons, then :
(A) ne
< np (B) ne
= np (C) ne
> np (D) None of these
2. The mass of an particle is :
(A) Less than sum of the masses of 2 protons & 2 neutrons
(B) Equal to mass of four protons
(C) Equal to mass of four neutrons
(D) Equal to sum of masses of two protons and two neutrons
3. Number of nucleons in the nucleus, is called :
(A) Mass number (B) Atomic number
(C) Neutron number (D) Electron number
4. Central core of the atom, is called :
(A) Ion (B) Orbit (C) Molecule (D) Nucleus
5. In nuclear reactions :
(A) Energy is conserved (B) Charge is conserved
(C) Momentum is conserved (D) All are correct
6. Neutron was discovered by :
(A) Rutherford (B) Anderson
(C) Chadwick (D) Millikan
7. A nucleus has 16 neutrons & its mass number is 31. The atomic number of this is :
(A) 47 (B) 31 (C) 15 (D) 16
8. The approximate temperature of the surface of the sun is
(A) 6000°C (B) 10,000°C
(C) 3000°C (D) 30,000°C
9. One MeV of energy is equivalent to
(A) 1.6 × 1013J (B) 1.6 × 1019J
(C) 1.6 × 10–13J (D) 1.6 × 10–19J
10. Which of the following is a better nuclear fuel ?
(A) Thorium 236 (B) Uranium 235
(C) Neptunium 239 (D) Plutonium 239
11. What is geothermal energy ?
12. What is ocean thermal energy ?
13. Define nuclear energy.
14. Name the particles contained in the nucleus of an atom.
15. Name the particle having same mass as that of electrons, but positively charged.
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