Choose the correct answer.

1. How many plants use different carbon fixation pathways?

A. 2           B. 3              C. 5                              D. 6

2. Which of the following plants thrive in a cool and moist habitat?

A.C2 plant          B. C3 plant             C. C4 plant                   D. CAM plant

3.  Which is a five-carbon sugar in the calvin cycle?

A. NADPH      B. PGA       C. PGAL        D. RuBP

4. How many molecules of NADPH does a PGAL need?

A.  1               B. 2             C. 3                              D. 4

choose the correct answer

1. 3 amps flow through a 1 Ohm resistor. What is the voltage?
(A) 1V (B) (C)3V (D)None of the above.
2. Why do we say the "voltage across" or "the voltage with respect to?" Why can't we just say
voltage?
(A) Voltage is a measure of Electric Potential difference between two electrical points.
(B) It's an Electrical Gliche.
(C) The other point could be Negative or positive.
(D) None of the above.
3. A resistor consumes 5 watts, and its current is 10 amps. What is its voltage?
(A) 10V (B)0.5V (C)2V (D)15V
4. A resistor has 10 volts across it and 4 amps going through it. What is its resistance?
(A) 2.5Ω (B)3.5Ω (C)4.5Ω (D) None of the above
5. If you plot voltage vs. current in a circuit, and you get a linear line, what is the
significance of the slope?
(A)Power (B) Discriminant (C)Resistance (D)None of the above.
6. A resistor has 8 volts across it and 3 Amps going through it. What is the power
consumed?
(A)24W (B)3W (C)8W (D)2.2W
7. A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power
consumed?

(A) 1.67 Watts (B) 11.67 Joules (C) 2.5 Watts (D) None of the above
8. A resistor has a voltage of 5 volts and a resistance of 15 ohms. What is the power
consumed?
(A) 1.67 Watts (B) 11.67 Joules (C) 2.5 Watts (D) None of the above
9. A resistor is on for 5 seconds. It consumes power at a rate of 5 watts. How many joules are used?
(A) 5 Joules (B)25 Joules (C)3 Joules (D)None of the above
10. A 1 ohm resistor has 5 volts DC across its terminals. What is the current (I) and the power
consumed?
(A) I = 5A & P = 25W. (B)I = 5A & P = 5W. (C)I = 5A & P = 9W (D)I = 5A & P = 3W.
11. The voltage across two resistors in series is 10 volts. One resistor is twice as large as the
other. What is the voltage across the larger resistor? What is the voltage across the
smaller one?
(A) V small − Resistor = 5V and V Big − Resistor = 5V.
(B) V Big − Resistor = 3.33V andV small − Resistor = 6.67V.
(C) V Big − Resistor = 6.67V and V small − Resistor = 3.33V.
(D) None of the above.
12. A 1 ohm, 2 ohm, and 3 ohm resistor are connected in series. What is the total resistance?
(A) R Total = 0.5454Ω. (B)R Total = 6Ω. (C)R Total = 3Ω. (D)None of the above.
13. Two identical resistors are connected in series. The voltage across both of them is 250 volts.
What is the voltage across each one?
(A) R 1 = 125V and R 2 = 125V.
(B) R 1 = 250V and R 2 = 0V.
(C) R 1 = 150V and R 2 = 100V.
(D) None of the above.
14. A 1 ohm, 2 ohm, and 3 ohm resistor are connected in parallel. What is the total resistance?
(A) (B) (C) (D)
15. A 5 ohm and a 2 ohm resistor are connected in parallel. What is the total resistance?
(A) (B) (C) (D)

16. A 7 ohm and a 3 ohm resistor are connected in parallel. What is the total resistance?
(A) (B) (C) (D)
17. Three 1 ohm resistors are connected in parallel. What is the total resistance?

(A) (B) (C) (D)
18. If you put an infinite number of resistors in parallel, what would the total resistance be?
(A) R total would approach Zero as The No. of Resistors In parallel Approaches Infinity.
(B) R total would approach 1 as The No. of Resistors In parallel Approaches Infinity
(C) It is not possible to connect that Number of Resistors in parallel.
(D) None of the above.
19. Two resistors are in parallel with a voltage source. How do their voltages compare?
(A) The voltage across both resistors is the same as the source.
(B) (B) The voltage across both resistors is half the voltage of the source.
(C) One has full voltage, the other has none.
(D) None of the above.
20. The unit of current is the
(A) ampere
(B) coulomb
(C) watt
(D) joule
(E) none of the above

Choose the correct answer:
1- Present-day applications of measuring instruments can be classified into.——–
a) Regulating trade. b) Monitoring functions. c) Measurement system theory. d) a&b.
2)———— the output signal consists of a proportion of the external voltage source applied
across the two ends of the potentiometer.
A) Null-type , B) deflection-type ,C) passive instrument ,D) active instrument.
3)————– is thus one consideration in the choice of instrument for a particular
application.
A) Tolerance, B) Linearity, C) Accuracy, D) Sensitivity.
4) ———– They have the ability to deal very effectively with systematic errors in
measurement systems, and errors can be attenuated to very low levels in many cases.
A) Digital instruments , B) Intelligent instruments, C) Analog instruments, D) All.
5) Careful instrument design is the most useful weapon in the battle against environmental
inputs; by reducing the ———of an instrument to environmental inputs to as low a level as
possible.
A) Linearity, B) Tolerance, C) Accuracy, D) sensitivity.