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Electricity and Magnetism
Page 4
Questions (3,267)
What is the resistivity of a cylindrical material wire whose length is 2.0mm a resistance of 4.0 ohms diameter of wire is 0.8mm
2 answers
asked by
Ese
121 views
Oddy currents
2 answers
asked by
Fuad Faji Jemal
64 views
potential difference, current resistance definition, abbreviation units and symbol
2 answers
asked anonymously
89 views
supposed two different material are rubbed together. Each one is brought near a charge, electric scope with no effect on the
2 answers
asked anonymously
101 views
A student wants to use the equation for Coulomb's Law to calculate the electric force between two charges. Which shows all of
4 answers
asked by
ulyjh,b
136 views
What mass of AL is deposited electronically in 30 minutes by current of 740A?
2 answers
asked by
Eebbisas
84 views
Which of the following statements is true?
The inverse of the slope of the non-ideal curve at V = V., is approximately equal to
2 answers
asked by
RAMI
109 views
Explain how to make an electromagnet.
2 answers
asked by
Milo
49 views
An electron is accelerated by s 5.2 kv potential difference how strong a magnetic field must be experienced by the electron if
2 answers
asked by
Abigail
88 views
An electrical insulator has:
a electrons tightly bound to its atoms b electrons that freely move c more protons than electrons d
2 answers
asked by
u
87 views
An electrical insulator has:
a more protons than electrons b electrons that freely move c electrons tightly bound to its atoms d
2 answers
asked anonymously
83 views
Which of the following is NOT a way you can strengthen an electromagnet?
a Using thinner wire b Increasing the number of coils of
2 answers
asked anonymously
59 views
Which statement explains how the charges attract each other, and objects determine the electric force between them?
1 answer
asked anonymously
92 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
6
91 views
Which of the following would be an example of an insulator?
a copper wire b tin can c cooking pan d Styrofoam cooler
1 answer
asked by
kali
119 views
Circuit is a parallel circuit.
1 answer
asked by
kali
64 views
A 12-V battery is connected to a light bulb with a resistance of 2Ω. What is the current in the circuit?
1 answer
asked by
T
66 views
Sam, an electrician, wraps a copper wire with a thick plastic coating. What is he most likely trying to do?
a keep the electric
1 answer
asked by
A
97 views
A car radio with a resistance of 15 ohms draws a current of 0.87 amperes. What is the voltage of the car battery?
a 13 volts b
1 answer
asked by
kali
151 views
A 12-V battery is connected to a light bulb with a resistance of 2Ω. What is the current in the circuit? **You must show all
1 answer
asked by
kali
109 views
Which of the following statements regarding electric insulators is correct?
a Electric insulators are good heat conductors. b
1 answer
asked by
kali
157 views
An electrical insulator has:
a negatively charged ions b electrons tightly bound to its atoms c electrons that freely move d more
4 answers
asked by
no name
78 views
If an answer for Coulomb's Law is negative, it must mean the charges are opposite.
True False
4 answers
asked by
no name
181 views
what voltage will produce 3 A through a circuit that has 15 ohms of resistance?
1 answer
asked by
no name
62 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
no name
118 views
When combing one's hair, the comb becomes positively charged. What happens to the hair being combed?
Responses It loses
7 answers
asked by
s
99 views
What happens to the current flowing through a circuit as resistance increases?
a It reverses direction b It stays the same c It
1 answer
asked by
kali
98 views
Does the size of a 1,5V cell(battery) affect the internal resistance of a circuit containing: 3 different size
2 answers
asked by
Luke
718 views
The current in a hair dryer measures 15.0 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?
A. 120 V B. 0.5
9 answers
asked by
Eliza💕
9,582 views
Need help with these questions-
1.What causes an electric current in a wire? A.Electric feilds cause atoms to move in the wire
5 answers
asked by
mysterychicken
1,546 views
A conductor has a diameter of
1.00mm and length 2.00m the resistance of the material is 0.1Ω, its resistivity is___ A. 3.93 x
2 answers
asked anonymously
80 views
determine the amplitude of the output voltage in mV.
The amplitude of the input voltage is V_IN = 40 mV.
1 answer
asked by
Anonymous
78 views
How does increasing the distance between charged objects affect the electric force between them?
a The electric force increases
1 answer
asked by
no name
85 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1 answer
asked by
social studies
104 views
What happens to the current flowing through a circuit as resistance increases?
a It increases b It reverses direction c It stays
1 answer
asked by
social studies
67 views
In which kind of material is charge most easily transferred?
a insulators b semiconductors c nonconductors d conductors e train
1 answer
asked by
social studies
84 views
Name one way of making an electromagnet more powerful
1 answer
asked by
asjdhwuei
119 views
What do you need to create an electromagnet?
1 answer
asked by
asjdhwuei
85 views
Dependent variable in a circuit
2 answers
asked by
Promise
64 views
47. A circuit consists of a 220.0Ω
resistor and a 0.5II inductor connected across a generator that has a frequency of 120Hz and
2 answers
asked anonymously
68 views
An inductor, L = 75mH is
connected in series to a source of alternating emf of rms value 250V and frequency 50Hz. What is the rms
2 answers
asked anonymously
65 views
The force on a charge moving
with a velocity v in a magnetic field B is half of the maximum force when the angle between wave B
2 answers
asked anonymously
56 views
How could you increase the electrical force between two charges? (Select all that apply)
a increase the distance between the
1 answer
asked by
social studies
84 views
A mechanic dropped a bolt he needed to repair a car motor. He decided to make a simple electromagnet to try to attract the metal
1 answer
asked by
social studies
97 views
Fill in the blank.
For the magnetic field created around a current carrying wire in an electromagnet, the _________ the current,
4 answers
asked by
Bella
68 views
An electric current produces a(n):
a insulator b magnetic field c magnet d solenoid
1 answer
asked by
social studies
75 views
A charge is moved from one point to another in an electric field. Explain briefly the relationship between electric potential
1 answer
asked by
oyebodegoldencity
111 views
Suppose that you want to build a transformer that will convert 80 V power coming in the primary coil to 120 V power going out of
1 answer
asked by
soggy bob ross
105 views
A step-up transformer has 80 turns on its primary coil and 1200 turns on its secondary coil. The primary circuit is supplied
10 answers
asked anonymously
113 views
A horse shoe magnet is placed on a top pan balance . A 3,2cm wire is fixed horizontally between the poles of the magnetic.When
2 answers
asked by
Sandra
66 views
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