Physics Middle School

Use the following to answer question 46


I . increase the current


II. use a stronger magnet


III. use thicker wire


IV. reverse the battery


V. add more coils of wire inside the magnet


46. To increase the force with which the wire is pushed when the switch is closed, which of
the following things could be done?

a. I and II only
b. II, III, and IV only
C. II and IV only
d. I, II and V only


47. A group of students had built a homemade motor and were in the process of trying to
test it. When they hooked it up to their battery they found that the wires in their coil got hot, but the coil would not turn. Of the following solutions, which would be their best
course of action to make the motor spin?


a. add more wire to the coil

b. use a stronger magnet

C. use a higher voltage battery

d. plug into an AC source

Answers

Answer 1

Answer:

46.) A

47.) A

Explanation:

46.) To increase the force with which the wire is pushed when the switch is closed, the current flowing through the wire should be increased and the stronger magnet should be used.

Remember that

F = BIL

The force is directly proportional to magnetic field B and current I

a. I and II only

47.) Since the wires in their coil got hot, and the coil would not turn, this is overheating which may be as a result of to much voltage supply compare to the length of the length of the coil of wire. To correct this, more wire should be added to the coil.

Related Questions

if san andreas fault slips 2.5 cm each year how far would it separate in 100 years

Answers

Answer:

250cm or 2.5m

Explanation:

using direct variation

the length is = l

the time (year) = t

let k be the constant

so he have:

l=kt

2.5=k× 1

k= 2.5

Now in the next statement the 100 is given but not the length so

l=kt

~ l=k× 100 years

But k = 2.5

so :

l= 2.5×100

l= 250 cm

Hence it will be 250cm or 2.5m at which they will get separated

if earth were not tilted, would we still have seasons?

Answers

Answer:

Glad you asked that!

Explanation:

Actually,no.You see,if the earth was perfectly straight,then the northern hemisphere and southern hemisphere would have the same seasons,which is pretty much the world.But our world is tilted,so we happen to have differences for southern hemisphere and northern hemisphere.


Which converts mechanical energy to electrical energy?
A. A flashlight
B. An electric motor
C. A generator
D. An electromagnet

Answers

Answer:

c. A Generator

Explanation:

The whole point of a generator is to produce electrical energy. The generator will use a mechanical motor usually running off of gas to produce electricity.

How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can
pass a puck as quickly as possible?
OSmooth ice reduces the inertia of the hockey puck.
Smooth ice increases the force used to accelerate the hockey puck.
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
Save and Fxit

Answers

Answer:

c

Explanation:

edge 2021

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