Current is defined as the rate of charge flowing a point every second. Having a current of 1 Ampere signifies 1 Coulomb is flowing in a circuit every second. It is measured by the use of an ammeter which is positioned in series to the component to be measured. The current in the problem is calculated as follows:
I = 2.0 x 10^-4 C / 5.0 x 10^-5 s
<span>I = 4 A or 4.0 x 10^0 A</span>
According to the right-hand thumb rule, the forefinger gives the velocity of charge, the thumb gives the magnetic force and the center finger gives the direction of magnetic field.
then, as shown in the picture, the <span>direction of the magnetic force on the charge is in the right direction.</span>
Answer and Explanation:
It is given that bulb A has the half the resistance as B
WHEN THEY ARE CONNECTED IN SERIES : In series circuit we know that current is same in the whole circuit
The power is given by
the expression it is clear that the bulb which has more resistance consume more power as current is same, and the bulb which consume more power will be brightest
It is given that resistance of bulb A is half the resistance of B So bulb A will be dimmest in this case
WHEN THEY ARE CONNECTED IN PARALLEL : In parallel circuit voltage is same across the circuit
The power is given by
from the expression it is clear that the bulb which has least resistance will consume more power and so will be brightest
As the resistance of bulb A is less so it will be brightest in this case