A 6 V battery is connected to a 24 ohm resistor to create a circuit. The 6 V battery is then replaced with a 12 V battery. How d
oes the current change in the circuit when the 12 V battery is used instead of the 6 V battery? *
3 points
The current is reduced by one-fourth.
The current is reduced by one-half.
The current is doubled.
The current is tripled.
Which of the following actions can produce an electric current in a loop of wire? *
2 points
spinning the wire near a battery
placing a resistor at the end of the wire
heating a switch and placing it on the wire
moving a magnet up and down near the wire
A student began an investigation by wrapping several coils of insulated wire around a steel nail. As shown in the diagram, when the ends of the wire were connected to a battery, the student was able to pick up several steel paperclips with the end of the steel nail. Which of the following claims is best supported by the student’s investigation? *
2 points
Captionless Image
An electric current in the wire produces a magnetic field.
An electric current in the wire produces a potential difference.
A magnetic field can produce an electric current in the wire.
A magnetic field can produce an electric current in steel paper clips
A student made the graph below to show how the amount of electrical force between two charged particles depend son another variable. The student’s graph is missing a label for the x-axis. What should the student label the x-axis? *
2 points
Captionless Image
Volume of Particles (m^3)
Mass of One Particle (kg)
Charge of One Particle (C)
Distance between Particles (m)
3 points
The current is reduced by one-fourth.
The current is reduced by one-half.
The current is doubled.
The current is tripled.
Which of the following actions can produce an electric current in a loop of wire? *
2 points
spinning the wire near a battery
placing a resistor at the end of the wire
heating a switch and placing it on the wire
moving a magnet up and down near the wire
A student began an investigation by wrapping several coils of insulated wire around a steel nail. As shown in the diagram, when the ends of the wire were connected to a battery, the student was able to pick up several steel paperclips with the end of the steel nail. Which of the following claims is best supported by the student’s investigation? *
2 points
Captionless Image
An electric current in the wire produces a magnetic field.
An electric current in the wire produces a potential difference.
A magnetic field can produce an electric current in the wire.
A magnetic field can produce an electric current in steel paper clips
A student made the graph below to show how the amount of electrical force between two charged particles depend son another variable. The student’s graph is missing a label for the x-axis. What should the student label the x-axis? *
2 points
Captionless Image
Volume of Particles (m^3)
Mass of One Particle (kg)
Charge of One Particle (C)
Distance between Particles (m)
1 answer:
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Answer:
Number of turns in secondary will be 7
Explanation:
We have given primary voltage
Number of turns in the primary is
Secondary voltage is given
We have to find the number of turns in secondary
We know that
So
As the number of turns can not be in decimal so number of turns will be 7
Answer:
∆h = 0.071 m
Explanation:
I rename angle (θ) = angle(α)
First we are going to write two important equations to solve this problem :
Vy(t) and y(t)
We start by decomposing the speed in the direction ''y''
Vy in this problem will follow this equation =
where g is the gravity acceleration
This is equation (1)
For Y(t) :
We suppose yi = 0
This is equation (2)
We need the time in which Vy = 0 m/s so we use (1)
So in t = 0.675 s → Vy = 0. Now we calculate the y in which this happen using (2)
2.236 m is the maximum height from the shell (in which Vy=0 m/s)
Let's calculate now the height for t = 0.555 s
The height asked is
∆h = 2.236 m - 2.165 m = 0.071 m
