Question Detail
Nuclear sizes are expressed in a unit named
- Fermi
- Angstrom
- Newton
- Tesla
Answer: Option A
1. Scalar Quantities are
- physical quantities which have magnitude only and no direction
- physical quantities which have no magnitude only and only direction
- physical quantities which have magnitude only and direction
- physical quantities which have no magnitude and no direction
Answer: Option A
2. Device used to measure potential difference between two points in a circuit is ?
- Ammeter
- Galvanometer
- Voltmeter
- None of above
Answer: Option C
3. Thomas Alva Edison invented
- Cinema
- Cine Camera
- Computer
- Cinematograph
Answer: Option D
Explanation:
Thomas Alva Edison of USA invented Cinematograph in 1891,
Cinema was invented by A.L. and J.L. Lumiere of France in 1895,
Cine Camera was invented by Friese-Greene of Britain in 1889,
Computer was invented by Charles Babbage of Britain in 1834, he is also known as Father of Computer.
4. Which instrument is used to measure the power of electric circuit ?
- Voltmeter
- Wattmeter
- Wavemeter
- Viscometer
Answer: Option B
Explanation:
Voltmeter - is used to measure electric potential difference between two points,
Wavemeter - is used to measure the wavelength of a radiowave,
Viscometer - is used measure viscosity of liquid.
5. Which instrument is used to measure pressure of gases ?
- Manometer
- Machmeter
- Magnetometer
- Micrometer
Answer: Option A
Explanation:
Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,
Magnetometer - is used to compare magnetic movements and fields,
Micrometer - is used to convert sound waves into electrical vibrations.