Answer:
It is given that the image is formed at a distance of 50cm from the lens. And since the image is real, v = +50cm. This means that u = -50cm. Therefore, the needle must be placed at a distance of 50cm from the lens.
Explanation:
Answer is 240 ohms
Use the equation V=IR, rearranging it to make R (resistance) the subject.
R = V/I
Substitute the values:
V = 120
I = 0.5
Resistance = 120 / 0.5
Resistance = 240 ohms
Answer:
option (a)
Explanation:
In an isothermal process, the temperature of the gas remains constant.
The internal energy of the gas is the function of change in temperature.
As the temperature is constant, so there is no change in the internal energy of the gas.
So, internal energy change is zero.
Answer:
no electric field line don't song closed loop.
B.
increases as the tension of the string increases