Answer:
Explanation:
Potential difference is created when a long object of length l moves perpendicular to magnetic field . The potential difference created is
V = Blv where B is magnetic field , l is length and v is velocity of length l .
here V = 45 x 10⁻⁶ x 44000 x 1.2
= 2.376 volt .
b )
Electric field = V / l ; V is potential difference between length l .
= 2.376 / 44000
= 54 x 10⁻⁶ V/m
Answer:
0.5 secs
Explanation:
F = m( v - u) /t
Mass m = 1000kg
Velocity v = 40m/s because it came to rest
time t = ?
Force = 80kN
= 80 x 1000 = 80000N
Therefore,
80000 = 1000 x 40 /t
Cross multiply
t x 80000 = 40000
Divide both sides by 80000
t = 40000/80000
t = 0.5 secs
Answer:
The force of the radiation on the surface is 3.33 x 10⁻¹⁰ N
Explanation:
Given;
intensity of light, I = 1kw/m² = 1000 W/m²
area of the surface, A = 1 cm² = 1 x 10⁻⁴ m²
Since the light is completely absorbed, the force of the radiation is given by;
F = P/c
where;
c is the speed of light = 3 x 10⁸ m/s
But P = IA
F = IA /c
F = (1000 X 1 X 10⁻⁴) / 3 x 10⁸
F = 3.33 x 10⁻¹⁰ N
Therefore, the force of the radiation on the surface is 3.33 x 10⁻¹⁰ N