Answer:
The current doubles
Explanation:
In a circuit, Ohm's law gives the relationship between voltage, current and resistance:
where
V is the voltage
R is the resistance
I is the current
In this problem,
V is held constant
R is halved:
Therefore, the new current is
So, the current doubles.
Answer:
B. Iron is a good conductor of electricity because the metallic
bonds between its atoms allow electrons to move freely.
Explanation:
Yes, if weather was hot you need more fluids in your body due to the sweat pores needing to cool you down.
Answer:
Their number should increase
Explanation:
The photoelectric effect is a phenomenon that causes the ejection of electrons from that metal as light shined onto a metal surface. Only certain frequencies of light can cause the ejection of electrons. However, if the frequency of the incident light is too low then no electrons were ejected even if the intensity of the light was very high. If the frequency of the light was higher then electrons were able to be ejected from the metal surface even if the intensity of the light was very low.
According to the accepted wave theory, light of any frequency will cause electrons to be emitted. Kinetic energy emitted by the electrons depends upon the intensity of light.
According to the accepted wave theory, number of electrons being ejected by the metal should increase
Answer:
b.the distance in which an oscillation repeats itself.
Explanation:
When a wave travels on the surface of water , the medium particle oscillates up and down remaining at the same place . They push their oscillation forward in the direction in which wave moves. wave length is distance between two consecutive oscillating particles having same phase of oscillation . When an oscillation repeats itself , they come to the same phase as the phase in the beginning.
Hence second option is correct.