PHYSICS ONE LINER SET 14

PHYSICS ONE LINER SET 14

1. Which is useful in the detection of landmines? Wasp
 
2. Which instrument used to measure the force and velocity of the wind? Anemometer
 
3. What is most suitable for the core of an electromagnet? Soft iron
 
4. A convex mirror makes a good rear-view mirror for a car. Why? It forms erect, reduced images
 
5. For the measurement of temperature of the order of 400°C, what will we
prefer?
Thermocouple
 
6. If the current in the core decreases, what will the strength of the magnetic field be?
Decreases
 
7. What is the commonly used unit for measuring the speed of data transmission? Bits per second
 
8. The change in temperature of a body is 50°C. What is the change on Kelvin
scale?
50 K
 
9. What is the amount of actual water vapour of air? Absolute humidity
 
10. How is Missile ‘Astra’? A air to air missile