We don't have enough information in the picture to answer that question.
The disembodied right hand could just as well grab the wire in the other direction, with the thumb pointing to the right.
Maybe if we knew WHY the hand is holding the wire in this direction, and what other electrical phenomenon may be involved, we might be able to say something about the current in the wire.
(Actually, we don't even know if it's a wire. It might be a soda straw, a coat hanger, or a pool cue.)
Answer:
The the maximum emf is 
Explanation:
Given that,
Magnetic field 
Frequency = 60 Hz
Diameter = 7.8 μm
We need to calculate the maximum emf
Using formula of emf
Where, N = number of turns
B= magnetic field
A = area
Put the value in to the formula
Hence, The the maximum emf is
Answer:
a.18.5 m/s
b.1.98 s
Explanation:
We are given that
a.Let be the initial velocity of the ball.
Distance,x=30 m
Height,h=1.8 m
Substitute the values
Initial velocity of the ball=18.5 m/s
b.Substitute the value then we get
t=1.98 s
Hence, the time for the ball to reach the target=1.98 s
Answer:
i) b. 14.3 Hz
ii) d. 0.4625 m/s
Explanation:
f = c / λ
f = frequency
c = speed
λ = wavelength
first question:
the given values,
λ = 2.17 m
c = 31 m/s
f = c / λ
f = 31 / 2.17
f = 14.28
∴ f = 14.3 Hz
second question:
given,
λ = 0.25 m
f = 1.85 Hz
f = c / λ
rearranging,
c = f × λ
c = 1.85 × 0.25
c = 0.4625
∴ c = 0.4625 m/s
(love your username, btw.)
Answer:
Efficiency: 0.4 (40%)
Explanation:
The efficiency of a simple machine is given by the ratio
where
is the input work of the machine
is the output work of the machine
For the machine in this problem, we have:
is the output work
is the input work
Therefore, the efficiency of the machine is
Which can be also written as percentage:
