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Class 10 Science MCQs contain topics also covered in the syllabus of classes 11th and 12th. The MCQs of Class 10 Science include topics like Work, Light, Electric Current, Magnetic Field, etc. Some of the most vital physics topics include Ohm’s Law, Electric Current and Circuit, Fleming’s Left and Right-Hand Rule, Magnetic Fields and Field Lines, Refractive Index Formula and more.
MCQs of Class 10 Science
Ques.1 The quantity of work, measured in joules, that is accomplished by the transfer of one unit of electric charge from one location in an electric circuit to another is called?
- Electric resistance
- Electric current
- Potential difference
- Electric conductance
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Ans. C. Potential difference
Explanation: When one unit of electric charge flows from one place to another in an electric circuit, a certain amount of effort, measured in joules, must be done to accomplish this.
Ques.2 What refers to the hindrance posed by a conductor's substance to the free flow of electric current?
- Inductance
- Conductance
- Resistance
- All of the above.
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Ans. C. Resistance
Explanation: Resistance is the substance's obstruction to the flow of electric current, hence resistance is the correct option.
Ques.3 Unlike a convex mirror, which creates a magnified reflection of the item in front of it, a concave mirror creates a virtual, refracted reflection that is less than the size of?
- At infinity
- Between P and F
- At E
- Between F and C
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Ans. D. Between F and C
Explanation: Therefore, the distance to the object is smaller than the mirror's focal length. The object must be positioned between the concave mirror's focus and its pole. Therefore, it is option (c).
Ques.4 What is the unit power of a lens?
- Diopter
- Millimetre
- Inch
- M¹
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Ans. A. Diopter
Explanation: A lens' power is proportional to the inverse of its focal length. Dioptre is the SI unit of power (D).
Ques.5 A magnetic field causes an alpha particle travelling west to be redirected north. A magnetic field is present. The field's direction is unclear.
- Towards east
- Towards west
- Upward
- Downward
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Ans. C. Upward
Explanation: According to Fleming's Left Hand Rule, the magnetic field is located where the forefinger is focused while the thumb is directed toward the direction of motion of positive charge (west) (upwards).
Read Also:
| Related Concepts | ||
|---|---|---|
| Electric Current and Circuit | Magnetic Fields and Field Lines | Resistance and Length Formula |
Ques.6 Which of the following generates power from the ocean's temperature gradients?
- Solar energy
- Tidal energy
- Ocean thermal energy
- Wave energy
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Ans. C. Ocean thermal energy
Explanation: Energy is generated by exploiting the contrasts in temperature between the ocean and the surrounding atmosphere. Utilizing the thermal gradients (differences in temperature) between the ocean's surface and its depths to generate electricity is known as ocean thermal energy conversion (OTEC).
Ques.7 Using this mirror, you may undoubtedly view a full length image of a faraway, tall structure, even if the building is located. Name the mirror.
- Concave mirror
- A plane mirror
- Convex mirror
- Both convex and as well as plane mirrors.
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Ans. C. Convex mirror
Explanation: No matter where the object is placed, a convex mirror will always produce a smaller, virtual picture. As a result, employing a convex mirror will undoubtedly allow you to view a full-length image of a distant, tall building.
Read Also: Potentiometer
Ques.8 You have access to liquids such as glycerine, kerosene, mustard oil, and water. If a ray of light were to enter any of these media at an angle, which would cause the most deflection?
- Kerosene
- Mustard oil
- Water
- Glycerine
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Ans. D Glycerine
Explanation: The refractive indices of the materials presented are 1.44 for kerosene, 1.33 for water, 1.46 for mustard oil, and 1.74 for glycerine. As a result, glycerine has the highest refractive index because it is the optically densest and light flows through it at the slowest speed, leading to the greatest degree of internal refraction. As a result, the incident ray will be bent more steeply the higher the refractive index of the material.
Ques. 9 In front of a mystical-looking glass, a young youngster gazes curiously. The image of her head is larger, and the image of her midsection is the same size, but the image of her legs is smaller. The magic mirror's combinations are as follows, starting at the top:
- Concave, plane and convex
- Plane, convex and concave
- Convex, plane and plane
- None of the above
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Ans. A. Concave, plane and convex
Explanation: A concave mirror must be utilised if the child's reflection is to have her head appear smaller. An expanded, vertical reflection is created by a concave mirror. Since her midsection has not been transformed, it is necessary to treat that section of the mirror as a flat one.
Ques.10. N- and S-poles are produced at the ends of a long, straight solenoid when a current flows through it. The erroneous statement among the following is
- This is because the magnetic field is uniform throughout the solenoid, as indicated by the straightness of the field lines within the solenoid.
- A particle of magnetic material, such as soft iron, can be magnetised by the intense magnetic field produced inside the solenoid.
- The solenoid's magnetic field has a unique pattern that doesn't exist in the vicinity of a bar magnet.
- When the direction of current through the solenoid is switched, the N- and S-poles switch places.
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Ans. C. The solenoid's magnetic field has a unique pattern that doesn't exist in the vicinity of a bar magnet.
Explanation: the pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.
Ques. 11 Kilowatt hour is the unit of which term?
- Energy
- Power
- Force
- Impulse
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Ans. A. Energy
Explanation: One kilowatt of power used for one hour is equal to one kilowatt-hour. It is equivalent to 3.6 megajoules in SI-derived units with fancy names. Electric utilities typically charge their customers for the energy they use in kilowatt-hours.
Ques. 12 Large-current-carrying materials are referred to as?
- Alloy
- Conductors
- Semiconductors
- Insulators
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Ans. B. Conductors
Explanation: A substance or material that permits electricity to flow through it is called a conductor or electrical conductor. A conductor is a material that allows electrical charge carriers (often electrons or ions) to travel freely between atoms in response to an applied voltage.
Ques.13 What is called variable resistance?
- Rheostat
- Open switch
- Resistor
- None of the above
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Ans. A. Rheostat
Explanation: A variable resistor that can either increase or decrease resistance to regulate the flow of electric current is called a rheostat.
Ques 14. In case two incandescent light bulbs with each having ratings 40 and 60 W are connected in series across the mains, then?
- Bulbs together consume 100 W
- 40 W bulb glows brighter
- 60 W bulb glows brighter
- Bulbs together consume 50 W
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Ans. B. 40 W bulb glows brighter
Explanation: The brightness of the bulb is directly proportional to the power which is consumed. Thus, the resistance of the 40 W bulb will be higher, helping it to glow brighter when connected in parallel.
Ques 15. The filament of a torch bulb is:
- Metal tip at the base’s center
- Metal Case
- Thin Wire
- Two Thick Wires
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Ans. C. Thin Wire
Explanation: The filament of a torch bulb is typically in the form of a thin wire, giving off light. It is then fixed to two thicker wires that helps to support it
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