Answer:
EMF of the power source, E = 19.34 volts
Explanation:
It is given that,
Voltage at which computer sensor is operated, V = 11.7 V
Power, P = 26.37 W
Total resistance of the power source, R = 2.23 Ohms
Firstly, calculating the current in the circuit. It is calculated as :
I = 3.43 A
Let E is the emf of the power source. It is given by,
E = 19.34 volts
Hence, the EMF of the power source is 19.34 volts. Hence, this is the required solution.
The alteration of a rivers flow and sediment transport down stream of a dam often causes the greatest sustained environmental impacts. Life in and around a river evolves and is conditioned on the timing and quantities of river flow
Answer:
The current is changing at the rate of 0.20 A/s
Explanation:
Given;
inductance of the inductor, L = 5.0-H
current in the inductor, I = 3.0 A
Energy stored in the inductor at the given instant, E = 3.0 J/s
The energy stored in inductor is given as;
E = ¹/₂LI²
E = ¹/₂(5)(3)²
E = 22.5 J/s
This energy is increased by 3.0 J/s
E = 22.5 J/s + 3.0 J/s = 25.5 J/s
Determine the new current at this given energy;
25.5 = ¹/₂LI²
25.5 = ¹/₂(5)(I²)
25.5 = 2.5I²
I² = 25.5 / 2.5
I² = 10.2
I = √10.2
I = 3.194 A/s
The rate at which the current is changing is the difference between the final current and the initial current in the inductor.
= 3.194 A/s - 3.0 A/s
= 0.194 A/s
≅0.20 A/s
Therefore, the current is changing at the rate of 0.20 A/s.
Answer:
The net force of engine on total mass of train is 35000 N
The net acceleration is 1.944 m/s²
I