Answer:
Work is best defined as a force exerted on a body to cause it move over a certain distance.
work=force×displacement×cosθ
Explanation:
Answer:
Explanation:
This is a displacement vector since it is defined in terms of distance (meters, to be exact). The way you find the y-component is
which says that you multiply the magnitude of the vector (its length) by the sin of the direction (the angle):
and get
12.1 m
Answer:
Magnitude of induced emf will be 
Explanation:
We have given radius of the circular loop r = 19.7 cm = 0.197 m
So area of the circular loop 
It is given that magnetic field is changing as 
Emf induced in the circular loop is equal to 
So emf induced will be equal to 
So magnitude of induced emf will be 
Explanation:
It is given that,
Distance between wires, d = 3.5 mm = 0.0035 m
Power of light bulb, P = 100 W
Potential difference, V = 120 V
(a) We need to find the force per unit length each wire of the cord exert on the other. It is given by :

Power, P = V × I

This gives, 


(b) Since, the two wires carry equal currents in opposite directions. So, teh force is repulsive.
(c) This force is negligible.
Hence, this is the required solution.