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Answer:
The required heat flux = 12682.268 W/m²
Explanation:
From the given information:
The initial = 25°C
The final = 75°C
The volume of the fluid = 0.2 m/s
The diameter of the steel tube = 12.7 mm = 0.0127 m
The fluid properties for density
= 1000 kg/m³
The mass flow rate of the fluid can be calculated as:




To estimate the amount of the heat by using the expression:

q = 0.0253 × 4000(75-25)
q = 101.2 (50)
q = 5060 W
Finally, the required heat of the flux is determined by using the formula:



q" = 12682.268 W/m²
The required heat flux = 12682.268 W/m²
Answer:
The current drawn from the outlet is 0.2 A
The number of turns on the input side is 350 turns
Explanation:
Given;
number of turns of the secondary coil, Ns = 35 turns
the output current,
= 2 A
power supplied,
= 24 W
the standard wall outlet in most homes = 120 V = input voltage
For an ideal transformer; output power = input power
the current drawn from the outlet is calculated;

The number of turns on the input side is calculated as;

Answer:
There are three leads on a bipolar transistor and each of these leads is given a name:
- Collector: This lead is attached to the largest of the semiconductor regions. ...
- Emitter: Attached to the second largest of the semiconductor regions. ...
- Base: Attached to the middle semiconductor region.
Answer:
There are six conditions
1. Poles should contain some residual flux.
2. Field and armature winding must be correctly connected so that initial mmm adds residual flux.
3. Resistance of field winding must be less than critical resistance.
4. Speed of prime mover of generator must be above critical speed.
5. Generator must be on load.
6. Brushes must have proper contact with commutators.
Explanation: