0
What causes the internal resistance of a dry cell to increase as time passes by?
FireKing
Corrosion- Oxidation specifically where molecules are deposited on conductive materials.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
When an electric current passes through water it causes the water to start to combust?
no, when an eletric current passes through water, it causes the water to start to decompose into hydrogen and oxygen
Some plants have an internal system of tube like structures through which water and food move this tissue is called?
water passes through xylem and food passes through phloem.
Nerve that passes through the internal acoustic meatus?
The Facial n (CN VII) & Vestibulocochlear n (CN VIII).
What causes a total eclipse of the sun?
The moon passes in front of the sun and this causes a shadow to be cast on the earths serface. When the sun is completely covered by the moon this is called a total eclipse.
Why should we not touch electric appliances with your wet hands?
It's the electric current that hurts you, not the voltage. But the current is determined by:Current = Voltage / Resistance.Normally your skin has very high resistance; since resistance is in the denominator, this means low current.But water will lower your skin's resistance, thereby raising the amount of current flowing through your body.
Why is the internal resistance of a voltage source made to be low?
When a voltage source, such as a battery or a generator, is on open circuit -in other words, when it is not supplying a load- the voltage appearing across its terminals is called its 'open circuit voltage' and corresponds numerically to its electromotive force.However, when the voltage source supplies current to a load, that current also passes through the voltage source itself. This causes an internal voltage drop, which is the product of this current and the voltage source's internal resistance. This voltage drop acts in the opposite direction to the electromotive force and reduces the source's terminal voltage. This internal voltage drop will increase, of course, if either the load current increases or the internal resistance increases.So, in order to keep that the source's internal voltage drop is as low as possible, its internal resistance must be as low as possible. In the case of a battery, the internal resistance is due to the ionic resistance of the electrolyte/plates, whereas in a generator it is due to the resistance of the windings.
When you jump your car it want start cable get hot?
Electricity passes through the cable. As it passes through the cable, the electricity will encounter resistance. This is what causes an electrical cable to heat up.
Why shunt resistance is used ammeter?
A shunt resistance is a low resistance connected parallel to the galvanometer so that a large portion of current passes through the low resistance and a small fraction of current passes through the galvanometer this saves the galvanometer from damage
When a current passes through a resistance what is the electric energy that is lost?
Becomes heat.
What causes incandescent light bulbs to produce light?
The filament in the bulb has a high resistance to the flow of electricity. As electricity passes through it, the filament heats up and begins to glow, giving off the visible light you see.
When a current passes through a resistance what happens to the electric energy that is lost?
Becomes heat.
What heats the wire of a light bulb?
When electricity passes through the wire of a light bulb, the resistance in the wire causes it to heat up through a process called Joule heating. This heating effect causes the wire to reach such high temperatures that it emits light and produces illumination in the bulb.
When an electric current passes through water it causes the water to start to combust?
no, when an eletric current passes through water, it causes the water to start to decompose into hydrogen and oxygen
What is the effect of internal resistance of the source to its output voltage?
(a) It reduces the amount of current.(b) Any current that does pass the resistor will lose some power; this lost power is converted to heat in the resistance.AnswerInternal resistance acts to reduce the terminal voltage of the voltage source when it supplies a load. This is due to the internal voltage drop caused when the load current passes through the internal resistance of that source. The greater the load, the lower the resulting teminal voltage.By definition, a voltage source's electromotive force is equal to the sum of the voltage drops, including the internal voltage drop, of the circuit supplied.
When the light passes through the second medium what happens to the wave that causes the light to bend?
When light passes through a second medium with different refractive index as the first medium, its velocity will decrease or increase depending on its wavelength and the difference in refractive index of the two media. This causes the 'bending' of light as each of its components try to travel through the second medium at different velocities.
When current passes through a conductor what makes the conductor heat up?
The electrical resistance of the material. All materials have some electrical resistance except for superconductors.
What causes the change in direction when light passes into glass?
REFRACTION
