Answer:
d. Both A & C
Explanation:
- The velocity of the ball is a vector, whose magnitude indicates its rate of change of position, and it has a direction. In this case, the ball is moving upward, therefore the direction of motion is upward, so the direction of the velocity is upward as well.
- The acceleration of the ball is a vector, whose magnitude indicates the rate of change of the velocity. The direction of the acceleration is:
-- positive if the the magnitude of the velocity is increasing
-- negative if the magnitude of the velocity is decreasing
For a ball thrown upward, the acceleration is given by the acceleration of gravity, 
. This acceleration points downward, and it is constant during the entire motion. In particular, it does not change direction, as it is always directed downward. Therefore, the acceleration of the ball is downward.
So, the correct answer is
d.Both A & C
Since A and C are both true:
a.The velocity vector is directed upward.
c.The acceleration is directed downward.
Simple: if a charge is positive, it loses electrons. If negative, it gains.
6.10 x 10^9 / 3 x 10^5 = 2.033 x 10^4 seconds = 20.33 / 3.6 = nearly 6 hours
.
Answer:
The reading on the ammeter A₁ , should be 2 Amp.
Explanation:
Given circuit shows all the bulbs are connected in parallel and ammeter A(T) at the source reads 6 Amp.
So, as the bulbs are in parallel connection, the current gets divided equal to each bulb.
so, the reading on the ammeter A₁ , should be 2 Amp.
But it will show 6 Amp, which is three times of the required value(2 amp).
This is because there was a mistake while making the circuit connections.
Instead of making connections as given circuit, the connections were made different as uploaded circuit.
Instead of connecting ammeter A₁ to only one bulb, it is connected to all the bulbs.
To correct this, remove the wire connecting ammeter and the second bulb.
And connect the second bulb directly to the switch.
