The AC voltage source is connected to an inductor and a resistor in series. If the frequency of the source is increased the current in the circuit will .

If the frequency of the source is increased the current in the circuit will decrease.

Explanation:

The current through the circuit is given as;

Where;

V is the voltage in the AC circuit

Z is the impedance

Where;

R is the resistance

is the inductive reactance

= ωL = 2πfL

where;

L is the inductance

f is the frequency of the source

Finally, the current in the circuit is given as;

From the equation above, an increase in frequency (f) will cause a decrease in current (I).

Therefore, If the frequency of the source is increased the current in the circuit will decrease.

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers