2.5 watt
Explanation:
we know
power = work done /time
work done gainst gravity is = mgh
as mg = weight = force = 5 N
and height = 2 m
so work done = mgh = 5*2 = 10N
therefore ,
Power = 10/4 = 2.5 watt
Explanation:
Using Newtons second law on each block
F = m*a
Block 1
Block 2
Block 3
Solving Eq1,2,3 simultaneously
Divide 1 and 2
Put Eq 4 into Eq3
Put Eq 5 into Eq2 and solve for a
Substitute back in Eq2 and use Eq4 and solve for T2 & T1
Answer:
Current, I = 0.0011 A
Explanation:
It is given that,
Diameter of rod, d = 2.56 cm
Radius of rod, r = 1.28 cm = 0.0128 m
The resistivity of the pure silicon,
Length of rod, l = 20 cm = 0.2 m
Voltage,
The resistivity of the rod is given by :
R = 893692.30 ohms
Current flowing in the rod is calculated using Ohm's law as :
V = I R
I = 0.0011 A
So, the current flowing in the rod is 0.0011 A. Hence, this is the required solution.
Answer:
Maybe A. waving your arms?
Answer:
The amount of charge that flow through a point is
Explanation:
From the question we are told that
The number of turns is
The area is
The total resistance is
The magnetic field in first direction is
The magnetic field in second direction is
The change in magnetic field is evaluated as
substituting values
The induced emf due to the change is mathematically evaluated as
This can also be mathematically represented as
Where I can be mathematically represented as
So
Now
=>
substituting values