A light bulb and a solenoid are connected in series to a battery. An irod rod is thrust rapidly into the solenoid and later rapi
2 answers:
Answer:
The correct option is;
3. Dims in, Brightens out
Explanation:
Inserting the iron rod into the current carrying solenoid causes the inductance and hence impedance to increase. Increasing impedance increases the circuit total resistance to current flow, thereby reducing the amount of electric current, which causes the light bulb to dim as the iron rod enters the solenoid.
The reverse happens as the iron rod is rapidly removed.
The inductive reactance is given by;
Inductive reactance, = 2·π·f·L
Where;
L = Inductance (Henries)
ω = Angular velocity in radians
f = Frequency
current, I is given by
Therefore
Iron rod entering the solenoid increases inductance, decreases the current and the bulb is dimmer.
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Answer:
h = 1.8 m
Explanation:
The initial velocity of the glove, u =- 6 m/s
We need to find the maximum height of the glove. Let it is equal to h. Using equation of kinematics. At the maximum height v = 0
, h is the maximum height and a = -g
Hence, it will go up to a height of 1.8 m.
Answer:
v₃ = 3.33 [m/s]
Explanation:
This problem can be easily solved using the principle of linear momentum conservation. Which tells us that momentum is preserved before and after the collision.
In this way, we can propose the following equation in which everything that happens before the collision will be located to the left of the equal sign and on the right the moment after the collision.
where:
m₁ = mass of the car = 1000 [kg]
v₁ = velocity of the car = 10 [m/s]
m₂ = mass of the truck = 2000 [kg]
v₂ = velocity of the truck = 0 (stationary)
v₃ = velocity of the two vehicles after the collision [m/s].
Now replacing: