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mlandon922
mlandon922
27.10.2020 • 
Physics

48) If the motor M rotates in the direction shown by the arrow as illustrated in the diagram below, what is going on? A. 1 and 2 are going down
B. 1 goes up and 2 goes down
C. 1 and 2 are going up
D. 1 goes down and 2 goes up
49) For the system in the diagram below to be in equilibrium, what is the mass of P in pounds? The mass at the other end of the beam is 5 kg.

A. 5.5 lb
B. 2.8 kg
C. 10 kg
D. none of these
50) These 3 wells have been drilled with a mud of specific gravity of 1.25 gr/cm3. In which well A, B or C, will the highest hydrostatic bottom hole pressure be recorded ?

A. Well A
B. Well B
C. Well C
D. All three will have equal bottom hole pressure
51) If the density of A is greater than the density of B. What is going to happen ?

A. If P floats in liquid A, it will also float in B.
B. If P floats in liquid B, it may or may not float in A, depending on the density of P.
C. If P sinks in B, it will sink in A also.
D. None of the above answers are correct.
52) For the circuit shown below, if V=380VAC and the bulb is rated at 170VAC, 5W, what is the resistance R that should be connected in series to the bulb?

A. 6500 ohms
B. 7000 ohms
C. 7145 ohms
D. 5780 ohms
53) If we increase the voltage across a DC motor, then the motor speed will?
A. decrease
B. increase
C. stay same
D. stop
54) What will be the output voltage of two 12V batteries connected in series?
A. 12 V
B. 6 V
C. 24 V
D. no voltage
55) What will be the output voltage of two 12V batteries connected in parallel?
A. 12 V
B. 6 V
C. 24 V
D. no voltage

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