Related Questions

Hot wire anemometer is used to measure
A Pressure in gases
B Liquid discharge
C Pressure in liquids
D Gas velocities
Hot wire anemometer is used to measure the
A Velocity of liquids
B Temperature of liquids
C Velocity of gases
D Pressure of liquids
Hot wire anemometer is used for the measurement of
A Flow rates of fluids
B Flow rates of granular solids
C Very high temperature
D Thermal conductivity of gases
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.
A No change
B Decrease
C Increase
D Exponential decrease
In hot wire aneomometer used for gas flow measurement, the wire is normally made of
A Copper
B Platinum
C Constantan
D Chromium
নয়টি বেলনাকৃতির তার, যাদের প্রতিটির ব্যাস d ও দৈর্ঘ্য L, একত্রে শ্রেণি সজ্জায় সংযুক্ত আছে। সজ্জাটির রোধ যদি একটি L দৈর্ঘ্যের বেলনাকৃতির তারের রোধের সমান হয়, তবে তারটির ব্যাস কত? (Nine cylindrical wires each of diameter d and length L are connected in series. If the resistance of the connection is equal to the resistance of another cylindrical wire of length L, then what is the diameter of the wire?)
A 3d
B 9d
C d3
D d9
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
A $$\frac{1}{9}$$ times
B 3 times
C 9 times
D Unchanged
High resistance electrical heating elements/wire are not made of
A Marageing steel
B Nimonic alloys
C Kanthal wire
D Nichrome
The component that forms the electrical connection between the rotating coil of wire in a motor and the external source of electrical energy is called the:
A rotor
B armature
C battery
D commutator
E None of the above
Vane anemometer
A Is an area meter
B Is a variable head meter
C Rotates an element at a speed determined by the velocity of the fluid in which the meter is immersed
D None of these

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