Prev 1 2 3 4 5 Next
41. Which one of the following is not the unit of heat ?
A. Centigrade
B. Calorie
C. Erg
D. Joule
ANSWER:A
SOLUTION :Centigrade is not a unit of heat, but rather a unit of temperature. The units of heat are calorie, erg, joule, and kilojoule.
42. Angstrom is a unit of __________.
A. Wavelength
B. Energy
C. Frequency
D. Velocity
ANSWER:A
SOLUTION:An angstrom (Å) is a unit of length that measures the wavelength of light. It is also used to measure the size of microscopic structures and chemical bond length. One angstrom is equal to 10−10 meters, or 0.1 nanometers. Visible light ranges from 4000 to 7000 angstroms.
43. Megawatt is the measuring unit of power which is __________.
A. Generated
B. Consumed
C. Saved
D. Lost in transmission
ANSWER:A
SOLUTION:A megawatt (MW) is a unit of power that measures the amount of electricity generated by a power plant or the amount of electricity a city needs.
44. PARSEC is the unit of ___________.
A. Distance
B. Time
C. Light intensity
D. Magnetic force
ANSWER:A
SOLUTION:A parsec is a unit of distance used to measure the vast distances between astronomical objects outside the solar system. It is roughly equivalent to 3.26 light-years, 206,000 astronomical units, or 30.9 trillion kilometers.
45. ‘Ohm – meter’ is unit of _________.
A. Resistance
B. Conductance
C. Resistivity
D. Charge
ANSWER:C
SOLUTION:The unit of resistivity is ohm-metre.
46. Frequency is measured in __________.
A. Hertz
B. Metre/Second
C. Radian
D. Watt
ANSWER:A
SOLUTION :Frequency is measured in hertz (Hz), which is an international unit of measure that is equal to one cycle per second.
47. Which of the following pairs of physical quantities does not have same dimensional formula?
A. Work and torque
B. Angular momentum and Planck’s constant
C. Tension and surface tension
D. Impulse and linear momentum
ANSWER:C
SOLUTION:So, among the above pairs only tension and surface tension does not have the same dimensional formula.
48. “Therm” is the unit of__________.
A. Power
B. Heat
C. light
D. Distance
ANSWER:B
SOLUTION: “Therm” is the unit of heat.
49. Which of the following physical quantity – SI unit pairs is correctly matched?
A. Power – Kilogram
B. Inductance – Henry
C. Capacitance- Ohm
D. Force – Newton
ANSWER:D
SOLUTION: Force – Newton.
50. Maxwell is the unit of which one of the following?
A. Magnetic flux
B. Permeability
C. Magnetic susceptibility
D. Intensity of magnetization
ANSWER:A
SOLUTION:The maxwell (Mx) is the CGS (centimeter, gram, and second) unit of magnetic flux.