A car battery can deliver up to 75 amps of current at a voltage of 12 volts. How much power is this?
2 answers:
Answer : Power = 900 watts
Explanation :
It is given that,
A car battery can deliver up to 75 amps of current at a voltage of 12 volts. The power delivered is given by the following relation :
or
or
In this case, we use relation (1)
The correct option is (A) " 900 Watts ".
Hence, this is the required solution.
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Answer:
False statement = There must be a non-zero net force acting on the object.
Explanation:
An object is moving at a constant speed along a straight line. If the speed is constant then its velocity must be constant. We know that the rate of change of velocity is called acceleration of the object i.e.
a = 0
⇒ The acceleration of the object is zero.
The product of force and acceleration gives the magnitude of force acting on the object i.e.
F = m a = 0
⇒ The net force acting on the object must be zero.
So, the option (a) is not true. This is because the force acting on the object is zero. First option contradicts the fact.