Bihar Board 10th Physics Objective: 40 MCQs with Answers

How many Bihar Board 10th physics objective questions should you practise?

If your Matric exam is near and you are hunting for honest bihar board 10th physics objective practice, you are in the right place. This post gives you 40 solved objective questions from Light, Electricity and Magnetism — the three chapters that quietly carry a big share of your Science (Physics) marks. Read the one-line reason under each answer, then Start with the free mock test.

Objective questions are the easiest marks to lock in — if you have practised them. You do not need to finish the whole book tonight; you need the common one-mark ideas right, again and again. Keep a rough copy beside you and attempt each question before you read the answer.

Want the full chapter-wise set? The Bihar Board Class 10 All In One mock test series has 101 tests with solutions in Hindi and English.

Which chapters give the most Class 10 Physics objective questions?

Light, Electricity and Magnetism are the backbone of Matric Physics objective questions. Here is how this practice set is split.

Chapter	Main topics	Questions here
Light	Reflection, refraction, lenses, human eye	15
Electricity	Current, Ohm's law, resistance, power	15
Magnetism	Magnetic effects, motor, generator	10
Total	All three units	40

Short on time? Do Electricity and Light first — their units, definitions and rules repeat every year as VVI objective questions. Magnetism is smaller but scoring, so do not skip it.

Light: reflection, refraction and the human eye

1. The focal length of a plane mirror is:
   • Zero
   • 25 cm
   • Infinity
   • Equal to object distance
   Answer: Infinity. A plane mirror reflects parallel rays as parallel, so its focal length is taken as infinite.
2. The mirror used as a rear-view mirror in vehicles is:
   • Concave
   • Convex
   • Plane
   • Cylindrical
   Answer: Convex. It gives an erect, smaller image and a wider view of traffic behind.
3. In a concave mirror, when the object is at the focus, the image forms at:
   • The pole
   • Centre of curvature
   • Infinity
   • The focus
   Answer: Infinity. Rays from the focus reflect parallel, so they meet only at infinity.
4. The SI unit of the power of a lens is:
   • Watt
   • Dioptre
   • Metre
   • Joule
   Answer: Dioptre (D). Power is 1 divided by the focal length in metres.
5. The power of a lens of focal length 2 m is:
   • 2 D
   • 0.5 D
   • 1 D
   • 4 D
   Answer: 0.5 D. P = 1/f = 1/2 = 0.5 D.
6. A concave lens always has:
   • Positive power
   • Negative power
   • Zero power
   • Infinite power
   Answer: Negative power. A concave (diverging) lens has a negative focal length and power.
7. Light travels fastest in:
   • Water
   • Glass
   • Diamond
   • Air
   Answer: Air. Air has the lowest refractive index, so light is fastest in it.
8. The splitting of white light into seven colours is called:
   • Reflection
   • Dispersion
   • Scattering
   • Refraction
   Answer: Dispersion. A prism spreads white light into its seven colours by dispersion.
9. When passing through a prism, the colour that bends the least is:
   • Violet
   • Blue
   • Red
   • Green
   Answer: Red. Red has the longest wavelength, so it deviates the least.
10. The twinkling of stars is due to:
    • Reflection
    • Dispersion
    • Atmospheric refraction
    • Scattering
    Answer: Atmospheric refraction. Changing air layers keep bending starlight, so stars seem to twinkle.
11. The blue colour of the sky is due to:
    • Reflection
    • Dispersion
    • Scattering of light
    • Refraction
    Answer: Scattering of light. Air molecules scatter blue light the most, so the sky looks blue.
12. The near point of a normal human eye is:
    • 25 m
    • 25 cm
    • 2.5 cm
    • Infinity
    Answer: 25 cm. This is the closest distance at which a normal eye sees clearly.
13. Myopia (short-sightedness) is corrected using a:
    • Convex lens
    • Concave lens
    • Cylindrical lens
    • Plane glass
    Answer: Concave lens. A concave (diverging) lens pushes the image back onto the retina.
14. Hypermetropia (long-sightedness) is corrected using a:
    • Convex lens
    • Concave lens
    • Bifocal lens
    • Plane glass
    Answer: Convex lens. A convex (converging) lens helps the eye focus on near objects.
15. The image formed on the retina of the human eye is:
    • Virtual and erect
    • Real and inverted
    • Virtual and inverted
    • Real and erect
    Answer: Real and inverted. The eye lens forms a real, inverted image; the brain reads it upright.

Electricity: current, Ohm's law and power

1. The SI unit of electric current is:
   • Volt
   • Ampere
   • Coulomb
   • Ohm
   Answer: Ampere (A). Current is the amount of charge flowing per second.
2. The SI unit of electric charge is:
   • Ampere
   • Coulomb
   • Volt
   • Watt
   Answer: Coulomb (C). Charge is measured in coulombs.
3. The SI unit of potential difference is:
   • Ohm
   • Ampere
   • Volt
   • Joule
   Answer: Volt (V). Potential difference is work done per unit charge, measured in volts.
4. The SI unit of resistance is:
   • Volt
   • Watt
   • Ohm
   • Ampere
   Answer: Ohm. Resistance is measured in ohms (Omega).
5. Ohm's law is written as:
   • V = IR
   • I = VR
   • R = VI
   • V = I/R
   Answer: V = IR. At constant temperature, voltage equals current times resistance.
6. An ammeter is always connected in:
   • Parallel
   • Series
   • Either way
   • Diagonally
   Answer: Series. It is placed in series so the full current passes through it.
7. A voltmeter is always connected in:
   • Series
   • Parallel
   • Either way
   • None of these
   Answer: Parallel. It is placed across the two points whose voltage you measure.
8. The resistance of a wire is ___ proportional to its length:
   • Inversely
   • Directly
   • Not
   • Square
   Answer: Directly. A longer wire offers more resistance.
9. The resistance of a wire is ___ proportional to its area of cross-section:
   • Directly
   • Inversely
   • Not
   • Equally
   Answer: Inversely. A thicker wire (more area) has less resistance.
10. The heating element of an electric iron is made of:
    • Copper
    • Nichrome
    • Aluminium
    • Silver
    Answer: Nichrome. It has high resistivity and a high melting point, so it glows without melting.
11. The commercial unit of electrical energy is:
    • Joule
    • Watt
    • Kilowatt-hour
    • Volt
    Answer: Kilowatt-hour (kWh). The "unit" on your electricity bill is 1 kWh.
12. 1 kWh is equal to:
    • 3.6 x 10^3 J
    • 3.6 x 10^6 J
    • 1000 J
    • 3600 J
    Answer: 3.6 x 10^6 J. 1 kWh = 1000 W x 3600 s.
13. Electric power is given by:
    • P = V/I
    • P = VI
    • P = I/V
    • P = IR
    Answer: P = VI. Power equals voltage times current (also I squared R or V squared / R).
14. In a series circuit, the current is:
    • Different everywhere
    • Same throughout
    • Zero
    • Doubled
    Answer: Same throughout. In series the same current flows through every component.
15. The charge on one electron is about:
    • 1.6 x 10^-19 C
    • 1.6 x 10^19 C
    • 9.1 x 10^-31 C
    • 6.25 x 10^18 C
    Answer: 1.6 x 10^-19 C. That is the charge on a single electron; 9.1 x 10^-31 is its mass.

Magnetism and magnetic effects of current

1. The direction of the magnetic field around a straight current-carrying wire is given by:
   • Fleming's left-hand rule
   • Right-hand thumb rule
   • Ohm's law
   • Lenz's law
   Answer: Right-hand thumb rule. Thumb points along the current, curled fingers show the field.
2. The force on a current-carrying conductor in a magnetic field is given by:
   • Right-hand thumb rule
   • Fleming's left-hand rule
   • Fleming's right-hand rule
   • Ohm's law
   Answer: Fleming's left-hand rule. It gives the direction of force on the conductor.
3. A device that converts electrical energy into mechanical energy is a:
   • Generator
   • Electric motor
   • Transformer
   • Galvanometer
   Answer: Electric motor. It turns electrical energy into rotation (mechanical energy).
4. A device that converts mechanical energy into electrical energy is a:
   • Electric motor
   • Electric generator
   • Ammeter
   • Fuse
   Answer: Electric generator. It uses induction to turn mechanical energy into current.
5. Outside a bar magnet, the magnetic field lines run from:
   • South to north
   • North to south
   • East to west
   • Randomly
   Answer: North to south. Field lines leave the north pole and enter the south pole outside the magnet.
6. Two magnetic field lines:
   • Always cross
   • Never intersect
   • Meet at the poles
   • Are straight
   Answer: Never intersect. If they crossed, the field would have two directions at one point.
7. The frequency of the AC supply in India is:
   • 60 Hz
   • 50 Hz
   • 220 Hz
   • 100 Hz
   Answer: 50 Hz. Household AC changes direction 50 times per second.
8. In household wiring, the earth wire is used for:
   • Carrying current
   • Safety
   • Lighting
   • Heating
   Answer: Safety. It sends any leakage current safely into the ground.
9. Producing an induced current by changing the magnetic field is called:
   • Magnetisation
   • Electromagnetic induction
   • Conduction
   • Dispersion
   Answer: Electromagnetic induction. A changing magnetic field induces a current in a coil.
10. A current-carrying solenoid behaves like a:
    • Capacitor
    • Bar magnet
    • Resistor
    • Battery
    Answer: Bar magnet. It develops a north and a south pole just like a bar magnet.

How should you practise bihar board 10th physics objective questions?

Reading answers feels productive, but it is not practice. Cover the answer, attempt the question, then check — that small struggle is what makes the idea stick in the exam hall.

Do one chapter a day as a timed set, mark every wrong answer, and revise only those the next morning. When you are ready for a full, exam-like paper, the All In One mock test series gives you 101 tests with solutions. For 50 more solved MCQs across all of Science, see Bihar Board Class 10 Science objective questions, and to practise unit by unit try the Matric chapter-wise online mock test guide.

What if you have very little time or you are attempting again?

If you are juggling a job, farm or family duties, do not aim for eight hours. Fix 45 honest minutes: 30 for a timed objective set, 15 to revise yesterday's mistakes. Small and daily beats long and rare.

If this is a repeat attempt, do not restart from page one. Pull out your last marksheet, find the two weakest chapters, and clear their objective questions first — that is where marks slipped away last time.

And if the paper pattern itself confuses you, do not trust WhatsApp forwards. The 2027 Matric date sheet is not out yet; confirm the subjects and marking scheme from the Bihar Board Class 10 exam page, and every date from the official BSEB website before you plan.

Your one step for today

Pick any one chapter above, attempt all its objective questions on paper, and score yourself honestly. Then Start with the free mock test and, when you want the full set, open the Bihar Board Class 10 All In One mock test series to keep practising bihar board 10th physics objective questions with answers.

Common questions on bihar board 10th physics objective practice

Which Physics chapters are most important for Bihar Board 10th objective questions?

Light, Electricity and Magnetism. Their units, definitions and rules — like Ohm's law, lens power and the right-hand thumb rule — come back as one-mark questions almost every year.

Are these Class 10 Physics objective questions useful for the 2027 Matric exam?

Yes — these concepts are stable in the NCERT-based Science syllabus. The 2027 date sheet is not out yet, so confirm the exam pattern and dates from the official notification before you plan.

Is Physics a separate subject in Bihar Board Class 10?

No. Physics is one part of the single Science paper, along with Chemistry and Biology, so these objective questions help your overall Science score.

Where can I practise more objective questions online for free?

Start with SeatBeat's free mock test, then move to the All In One series of 101 tests. For 50 more solved Science MCQs, read the Bihar Board Class 10 Science objective questions post.

Are these questions available in Hindi?

Yes. SeatBeat's Matric tests and their step-by-step solutions are available in both Hindi and English.