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Two resistances have lengths in the ratio 1:4 and radius 1:2,specific resistances in ratio 3:1. compare their resistances.Solution)Given lengths l1=1 l2=4Given radius r1=1 r2=2 Given specific resistances Ρ(rho)1=3 Ρ2= 1we know the R=Ρl/A R1/R2=3/1.
A scooterist is racing at a speed of 72 km per hour. If the radius of the wheel is 20 cm, find the angular speed of the wheels. Ans) 72kmph=20m/s 20cm=0.2m; v=rw w=v/r w=20/0
Suppose the sides of a closed polygam represent vector arrangend head to tail rule , what is sum of these vectors ?
So I have a question here and I am totally lost: A car starts from rest and accelerates at a constant rate of 1.1 m/s2. If the radius of the car wheels is 29.0 cm, and the final an
a) Explain ampere's law and calculate magnetic field at any point P beacuse of (i) Infinite long wire (ii) Inside a solenoid (iii) Inside a toroid b) Explain Biot S
The temperature of a gas is held constant whereas its volume is reduced. The pressure the gas exerts on the walls of its container enhances because its molecules: a) stri
Give the basic construction of pentode Ans: Construction of Pentode: Constructional details of a typical pentode are demonstrated in fig. (a) and fig. (b) Pentode comp
Why diffraction can't occur if slit width is less than the wavelength of the light? Can you explain?
Microprocessor A combination of IC's cal led a microprocessor. The data is processed in the microprocessor according to the instructions given through the input devices. A
When a certain beam of light falls upon a metal surface, it ejects photoelectrons from it. The number of photoelectrons ejected per second by the beam of light depends upon on
Electric Motor: A device, which converts electric energy into mechanical energy is known as Electric Motor. Factors on which the speed of Rotation of Motor Depends: The
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