Question Detail

Atmospheric pressure is measured by

Tonometer
Pyrometer
Barometer
Thermometer

Answer: Option C

1. Which instrument is used to determine the intensity of colours ?

Cathetometer
Chronometer
Colorimeter
Commutator

Answer: Option C

Explanation:

Cathetometer - is used to determine heights,

Chronometer - is used to longitude of a vessel at sea,

Commutator - is used to convert AC to DC.

2. The force which opposes the relative motion between different layers of liquid or gases is called

Critical Velocity
Streamline Flow
Terminal Velocity
Viscous Force

Answer: Option D

Explanation:

Critical Velocity - The maximum velocity upto which fluid motion is streamline is called Critical Velocity.

Streamline Flow - If velocity of all fluid particles is same all the time then it can be said in streamline flow.

Terminal Velocity - When a body falls in viscous medium, its velocity first increases and finally becomes constant. The constant velocity is called terminal velocity.

3. 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.

4. What is unit of Work and Energy ?

Joule
kilogram
amphere
meter

Answer: Option A

5. Which of the following is an electromagnetic wave ?

Cathode rays
Sound wave
Ultrasonic wave
Infra red rays

Answer: Option D