Answer:
Li has less mass and therefore less inertia, so he can change his motion more easily than Raj.
Explanation:
Inertia describes the resistance of an object to any change in its state of motion, and it depends on the mass of the object only. In particular:
- if an object has a large inertia (large mass), then it is more difficult to change its state of motion (i.e. to put it in motion, or to slow it down, or to change its direction of motion)
- if an object has small inertia (small mass), then it is more easy to change its state of motion
In this problem, Li has less mass than Raj, so he has less inertia, therefore he can change his motion more easily than Raj.
Answer:
g= 1.8 m/s²
Explanation:
From conservation of energy we know:
Solving for g with h being the height of the ramp with angle ∅ and length L:
(1) 
The velocity v at the bottom of the ramp for a constant acceleration a in a time t is given by:
(2)
Plugging equation 2 in to equation 1:
(3) 
Answer:
873 MW
Explanation:
Find the voltage in the primary circuit.
Vp / Vs = Np / Ns
Vp / 198 kV = 500 / 1700
Vp = 58.2 kV
Calculate the power.
P = VI
P = (58.2 kV) (15.0 kA)
P = 873 MW
Answer:
Explanation:
a ) No of turns per metre
n = 450 / .35
= 1285.71
Magnetic field inside the solenoid
B = μ₀ n I
Where I is current
B = 4π x 10⁻⁷ x 1285.71 x 1.75
= 28.26 x 10⁻⁴ T
This is the uniform magnetic field inside the solenoid.
b )
Magnetic field around a very long wire at a distance d is given by the expression
B = ( μ₀ /4π ) X 2I / d
= 10⁻⁷ x 2 x ( 1.75 / .01 )
= .35 x 10⁻⁴ T
In the second case magnetic field is much less. It is due to the fact that in the solenoid magnetic field gets multiplied due to increase in the number of turns. In straight coil this does not happen .
