Question

An RC circuit is created with a battery as a power source. The capacitor is initially uncharged. Immediately after the circuit is connected, what is the voltage across the capacitor? Group of answer choices

It is equal to the battery's terminal voltage.

It is less than the battery's terminal voltage, but greater than zero.

It is greater than the battery's terminal voltage.

It is zero.

2) A wire carries a current vertically downward. What direction will a compass needle point is it placed just north of the wire? Group of answer choices

toward the north.

toward the west.

toward the east.

toward the south.

the compass will not be affected by the wire.

3) A very long solenoid is constructed as a coil of wire. Current is allowed the flow through the solenoid which creates a magnetic field. How the does the magnetic field change if the radius of the solenoid is doubled but everything else about the solenoid doesn't change. Group of answer choices

becomes four times as strong

. becomes twice as strong.

remains the same.

becomes one half as strong.

becomes one fourth as strong.

Answer 1