Answer:
The correct option is (a).
Explanation:
Given that,
Current flowing through the resistor, R = 0.054 A
Resistance of the resistor, R = 15 ohms
We need to find the voltage. We know that, Ohm's law gives the relation between voltage, current and resistance i.e.
V = IR
Put all the values,
So, the required voltage is equal to 0.81 volts.
Answer:
The objects become oppositely charged and have equal amounts of charge.
Explanation:
There are three methods for charging objects:
- Conduction: a charged object is brought in contact with a neutral object. Electrons are transferred from the charged object to the neutral one, which also becomes charged
- Induction: a charged object is brought close (but not in contact) to a neutral object. The charges inside the neutral object redistribute, such that those of opposite sign to the charge in the charged object migrate on the side closer to the charged object, while the charges of same sign migrate towards the opposite side. If the neutral object is then grounded, the charges on the opposite side flow to the ground, leaving the neutral object charged as well
- Friction: two objects initially neutral are rubbed against each other. Electrons move from one object to the other one: therefore, one object becomes positively charged while the other one becomes negatively charged. Since the charge gained by one object is equal to charge lost by the other object, it follows that the two objects have same magnitude of charge, but with opposite sign.
0.51 m/s to the right.
<h3>Explanation</h3>
The two carts lock together. As a result, the collision is inelastic. Kinetic energy will not conserve. Still, momentum conserves.
What's the momentum <em>p</em> of the two carts?
Before the collisions:
- ;
- .
- Sum of momentum: .
Momentum conserves. As a result,
Velocity is the same for the two carts after the collision. Let denote that velocity.
.
.
Direction of the movement will stay the same. Both cars are now moving to the right.
<h2>Given :</h2>
<h2>Solution :</h2>
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