The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.
True
False
Answer: Option B
Similar Questions :
1. What are audible sound waves ?
Having frequency less than 20 Hz
Having frequency between 20 Hz to 20000 Hz
Having frequency more than 20000 Hz
None of above
Answer: Option B
2. Alfred Nobel invented
X ray
Diesel Engine
Dynamite
Dynamo
Answer: Option C
Explanation:
Alfred Nobel if Sweden invented Dynamite in 1867,
X ray was invented by Wilhelm Roentgen of Germany in 1895,
Diesel Engine was invented by Rudolf Diesel of Germany 1892,
Dynamo was invented by Michael Faraday of England in 1831.
3. 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.
4. Which instrument is used to record physical happenings at a distant place ?
Thermostat
Tonometer
Telemeter
Transponder
Answer: Option C
Explanation:
Thermostat - is used to regulate the temperature at a particular point.
Tonometer - is used to measure the pitch of a sound,
Transponder - is used to receive a signal and transmit a reply immediately.