Q: Which SI prefix represents the factor 10^-12?
Answer: Pico
Explanation: The prefix 'pico' represents the factor 10^-12. It is often used in the measurement of capacitance in picofarads. It is denoted by the lowercase letter p.
Q: The prefix 'giga' in SI units represents which factor?
Answer: 10^9
Explanation: The prefix 'giga' signifies a factor of one billion or 10^9. It is frequently seen in computer storage as gigabytes. It is denoted by the capital letter G.
Q: Which of the following is NOT a base SI unit?
Answer: Newton
Explanation: The newton is a derived SI unit, not a base unit. It is derived from the base units of kilogram, meter, and second. The other three options are primary base units.
Q: The SI unit of wave number is _____.?
Answer: Reciprocal meter
Explanation: The reciprocal meter (m⁻¹) is the SI unit for wave number. It represents the number of waves per unit length. This unit is important in spectroscopy and wave mechanics.
Q: Which SI prefix represents the factor 10^12?
Answer: Tera
Explanation: The prefix 'tera' represents a factor of one trillion or 10^12. It is denoted by the capital letter T. It is commonly used in terabytes for digital storage.
Q: What is the SI unit of molar mass?
Answer: Kilogram per mole
Explanation: The SI unit for molar mass is kilogram per mole. However, in chemistry, gram per mole is more frequently used in practice. It describes the mass of one mole of a substance.
Q: The SI unit of magnetic dipole moment is _____.?
Answer: Ampere-square meter
Explanation: Ampere-square meter is the SI unit for magnetic dipole moment. It is also equivalent to joules per tesla. This unit describes the strength and orientation of a magnet.
Q: The SI unit of luminous intensity is?
Answer: Candela
Explanation: Candela (cd) is the SI base unit of luminous intensity. It measures the power emitted by a light source in a particular direction. Lumen measures total light output, while Lux measures illumination on a surface.
Q: The SI unit of pressure is?
Answer: Pascal
Explanation: Pascal (Pa) is the SI unit of pressure, equal to one Newton per square meter (N/m²). Atmospheric pressure is approximately 101,325 Pa. The unit is named after French physicist Blaise Pascal.
Q: The SI unit of amount of substance is?
Answer: Mole
Explanation: Mole is one of the seven SI base units. One mole contains exactly 6.022 × 10²³ (Avogadro's number) elementary entities. It is used to count atoms, molecules, and ions in chemistry.