(A) peak value
(B) instantaneous value
(C) R.M.S. Values
(D) Average value
Answer- (B)
2. Almost all electrical measuring devices are AC Which value of (AC) represents-
(A) peak value
(B) instantaneous value
(C) R.M.S. Values
(D) Average value
Answer - (C)
3. In calculations A.C. What value is used for-
(A) peak value
(B) instantaneous value
(C) R.M.S. Values
(D) Average value
Answer- (D)
4. What is called the RMS value and the average value of the alternating quantities ?
(A) peak factor
(B) Crest Factor
(C) Farm Factor
(D) power factor
Answer - (C)
5. If the difference between two alternating quantities is 90 degrees, then what is called-
(A) anti phase
(B) Quadrature
(C) in phase
(D) None of these
Answer- (B)
6. The alternating quantities that reached their peak values later than other alternating quantities are called-
(A) Lagging quantities
(B) in phase quantities
(C) Leading quantities
(D) vector quantities
Answer- (A)
7. Electric current and voltage in pure resistive circuit
(A) current is the leading quantities
(B) Voltage is the leading quantities
(C) lives in the same phase
(D) None of these
Answer - (C)
8. Alternating current is called when-
(A) The amplitutde of the current varies with time
(B) The amplitutde and direction of the current varies with time
(C) The value of current remains the same throughout.
(D) direction of current changes with time
Answer- (B)
9. current said DC when It is -
(A) direction of current changes with time
(B) The amplitude of the current varies with time
(C) The measurement and direction of current vary with time.
(D) The measurement remains the same over time.
Answer- (D)
10. in India How much is the AC frequency value?
(A) 50 hertz
(B) 10 hertz
(C) 100 hertz
(D) 25 hertz
Answer- (A)
11. The frequency of the machine ............. depends on-
(A) at the poles joints
(B) on the shape of the poles
(C) on machine rating
(D) on the nature of supply
Answer- (A)
12. The angle between voltage and current is called ………….
(A) Form Factor
(B) phase difference
(C) Peak Factor
(D) None of these
Answer- (B)
13. If there is an angle between two alternating magnitudes, then these two alternating magnitudes are called ……….
(A) in phase
(B) Lagging
(C) leading
(The) out of phase
Answer- (D)
14. What is the ratio of R.M.S. value and average value called?
(A) peak factor
(B) Q factor
(C) power factor
(D) form factor
Answer- (D)
15. What is the ratio of Maximum value and RMS value called -
(A) peak factor
(B) Q factor
(C) power factor
(D) form factor
Answer- (A)
16. Two alternating magnitude are combined with the method of ................
(A) Algebraic
(B) graphical
(C) vector
(D) Geometry
Answer - (C)
17. A.C. Can be easily reduced / increased by ...............
(A) Converter
(B) inverters
(C) transformer
(D) rectifier
Answer - (C)
18. The power factor of a pure resistive circuit is ........
(A) zero
(B) lagging
(C) leading
(D) unit
Answer- (D)
19. The R-L-C circuit (whose power factor is XL> XC) is …………………….
(A) zero
(B) Lagging
(C) Leading
(D) unity
Answer- (A)
20. Which of the following frequencies will have the lowest frequency?
(A) 1 Hz
(B) 10 Mega Hertz
(C) 200 Mega Hertz
(The) 1 mega hertz
Answer - (C)