ELECTRIC CURRENT
IN LIQUIDS
IN LIQUIDS
What is an electrolyte?
This type of substance conducts electricity in liquid form by ions.
Distilled water is a good conductor.
False
What happens at the cathode?
Reduction (gain of electrons).
What is the source of a magnetic field?
A) Stationary charges
B) Moving charges
C) Neutrons
D) Light waves
B
What type of energy does a moving object have?
Kinetic energy
What are ions?
These charged particles move in a liquid to create electric current.
Electric current in liquids is due to electron flow.
False
Ions move randomly even without current.
True
Which rule determines the direction of magnetic field around a conductor?
A) Fleming’s Left-Hand Rule
B) Fleming’s Right-Hand Rule
C) Right-Hand Thumb Rule
D) Lenz’s Law
C
Write Newton’s Second Law.
F=ma
What is electrolysis?
The process of chemical decomposition caused by electric current in a liquid.
Term
A. Anode
B. Cathode
C. Electrolyte
Definition
1. Negative electrode
2. Positive electrode
3. Conducts via ions
A–2, B–1, C–3
Why does salt water conduct electricity but sugar solution does not?
Salt dissociates into ions; sugar does not.
What is the direction of field lines outside a magnet?
From north pole to south pole.
A body moves with velocity 10 m/s. What is its kinetic energy if mass = 2 kg?
100 J
What is the cathode?
Positively charged ions move toward this electrode.
What is the anode?
The electrode where oxidation occurs in electrolysis.
What is Ohm's Law?
This law relates current, voltage, and resistance in electrolytes.
Term
A. Tesla
B. Field line
C. Solenoid
Definition
1. Unit of magnetic field
2. Shows direction of field
3. Produces uniform field
A–1, B–2, C–3
A force of 50 N acts on a body of mass 10 kg. The body is initially at rest.
Find its velocity after 5 seconds.
25 m/s
What is Faraday's First Law of Electrolysis?
The law stating that the mass of a substance deposited is proportional to the charge passed.
What is the Faraday constant?
This constant represents the charge of one mole of electrons.
Charge passed if current is 3 A for 200 s?
Q = 600 C
A wire carries 5 A current. At distance 0.1 m, calculate magnetic field.
B≈1×10−5T
A resistor of 5 Ω is connected to a 10 V battery.
How much electrical energy is used in 10 seconds?
200 J