Question

Q.3 Calculate the generated emf of a wave wound DC generator which is having 720 conductors, flux per pole is 40mwb and is driven at 400rpm. ​

Answer 1

Answer:

Detailed Solution

Concept:

Induced emf in a generator is given by

Where,

N = speed in rpm

P = no of pole

ϕ = flux per pole

A = 2 for wave winding

= P for lap winding

Z = number of conductors

Calculation:

Given that,

Total number of conductors (Z) = slots × conductors per each slot

⇒ Z= 51 × 20 =1020

P = 4

ϕ = 0.007 wb

A = 4

N = 1500 rpm

Answer 2

Answer:

The value of g=

R

2

GM

.

If the density of earth is doubled keeping volume same, then the mass of the earth is also doubled. So, M becomes 2M.

So, the value of g will be doubled.