A current reading is obtained by properly placing an ammeter in a circuit consisting of one resistor ...

A current reading is obtained by properly placing an ammeter in a circuit consisting of one resistor and one battery. As a result
 
  A) the voltage drop across the resistor increases.
  B) the current flowing in the circuit increases.
  C) the current flowing in the circuit decreases.
  D) the current flowing in the circuit does not change.

Question 2

A 1.33 kg dense mass is on the end of a 4.50 m string.
 
  (a) What would be the period of the pendulum on Earth?
  (b) If the mass were doubled, what would be the frequency of oscillation?
  (c) What would be the period on the planet Mars where gravity is 38. that of the Earth?

Question 3

The critical angle is given by sinc (1/n1 ) for what condition?
 
  What will be an ideal response?

Question 4

What is the average separation between air molecules at STP?
 
  What will be an ideal response?