Which instrument maintains a constant temperature?
Correct Answer: Thermostat
A thermostat regulates and maintains a constant temperature by controlling heating or cooling devices.
What amplifies electric current?
Correct Answer: Amplifier
An amplifier boosts the strength of an electrical signal, making weak currents stronger for use in devices like radios and speakers.
Which instrument measures potential difference between two points?
Correct Answer: Voltmeter
A voltmeter is designed to measure the potential difference (voltage) between two points in an electric circuit.
Which instrument is used to measure the flow of air?
Correct Answer: Anemometer
An anemometer is an instrument that measures wind speed and the flow of air, often used in meteorology.
Which instrument is used to measure the density of gases?
Correct Answer: Aerometer
An aerometer is specifically designed to measure the density of gases or liquids.
What instrument measures radiant energy?
Correct Answer: Radiometer
A radiometer detects and measures radiant energy, often used in experiments involving light or heat radiation.
Which instrument is used for the conversion of rays into mechanical energy?
Correct Answer: Radiometer
A radiometer converts light rays into mechanical energy through the movement of vanes inside its glass bulb.
What instrument is used to measure the intensity of light?
Correct Answer: Luxmeter
A luxmeter is used to measure the intensity of light, especially in workplaces, studios, and greenhouses.
Which instrument measures the amount of light?
Correct Answer: Illuminometer
An illuminometer measures the total amount of light falling on a surface, often used in illumination studies.
Which instrument is used for observing very small and near objects?
Correct Answer: Microscope
A microscope is used to observe very small objects or details that cannot be seen clearly with the naked eye.
Which instrument is used for measuring distant objects?
Correct Answer: Telescope
A telescope is designed to view and measure distant objects by collecting and magnifying light.
Which instrument is used to measure electric current?
Correct Answer: Ammeter
An ammeter measures the flow of electric current in a circuit, typically in amperes.
Which apparatus in submarines gives a clear view of objects on the surface?
Correct Answer: Periscope
A periscope allows submarine crews to see above the water’s surface using mirrors or prisms.
What is used to measure the magnitude or intensity of earthquakes?
Correct Answer: Seismograph
A seismograph records earthquake waves, while the Richter Scale quantifies their magnitude.
What instrument is used to measure ocean depth?
Correct Answer: Fathometer
A fathometer measures the depth of the ocean using sound waves reflected from the sea floor.
Which instrument is used for measuring the flow of a fluid?
Correct Answer: Venturi Tube
A Venturi tube measures the rate of fluid flow by observing pressure differences.
Which scientific instrument is used for observing and photographing the sun’s corona?
Correct Answer: Coronagraph
A coronagraph blocks direct sunlight, allowing observation and photography of the sun’s corona.
What converts sound waves into electric energy?
Correct Answer: Microphone
A microphone converts sound waves into electrical signals, enabling recording or amplification.
What scientific instrument measures the approximate height above the ground?
Correct Answer: Altimeter
An altimeter measures altitude, commonly used in aircraft to determine height above sea level.
Which scientific instrument is used to measure the altitude of the sun?
Correct Answer: Sextant
A sextant is used in navigation to measure the altitude of the sun and stars above the horizon.
Scientific Instruments MCQs are an integral part of competitive exams, especially in the General Science section, where they test an aspirant’s knowledge of the tools used in scientific research and practical applications.
These questions are commonly asked to evaluate the understanding of various instruments like microscopes, thermometers, barometers, and voltmeters, along with their uses and measurements.
Mastering scientific instruments MCQs can significantly impact an aspirant's score, as they often account for a considerable portion of the exam, helping candidates stand out. The knowledge of scientific instruments also plays a vital role in job hunting, particularly in fields like research, engineering, healthcare, and laboratories, where a deep understanding of these tools is crucial for practical work.
In competitive exams, every mark counts—one mark can make your placement and keep you in the competition, while that same one mark can also make you out of the competition. Therefore, preparing thoroughly for these MCQs is essential. To make this process easier for aspirants, our team has prepared a comprehensive list of MCQs on scientific instruments, ensuring you are well-equipped to succeed in your exams.