| 1 |
Unit of impedance is: |
- A. Ohm
- B. Ohm<sup>-1</sup>
- C. no unit
- D. Ohm m<sup>-1</sup>
|
| 2 |
In LR circiut which one of the following statements is correct? |
- A. L and R opposes each other
- B. R value increases with frequency
- C. The inductive reactance increases with frequency
- D. The inductive reactance decreases with frequency
|
| 3 |
Vrms = |
- A. 0.7V<sub>∘</sub>
- B. <div>0.07V<sub>∘</sub></div>
- C. 0.007V<sub>∘</sub>
- D. 0.75V<sub>∘</sub>
|
| 4 |
Resistance of choke is |
- A. zero
- B. Large
- C. Very small
- D. Infinite
|
| 5 |
The combined effect of resistance and reactance in circuit is called: |
- A. Impedance
- B. Inductance
- C. Capacitance
- D. None of above
|
| 6 |
In three phase A.C. generator the phase difference between each pair of coil is. |
- A. 45<sup>o</sup>
- B. 90<sup>o</sup>
- C. 120<sup>o</sup>
- D. 60<sup>o</sup>
|
| 7 |
In RLC circuit the energy is dissipated in |
- A. R only
- B. R and L
- C. R and C
- D. L and C
|
| 8 |
In metal detector, we use. |
- A. L-C circuit
- B. R-L circuit
- C. R-C circuit
- D. RLC series circuit
|
| 9 |
X<sub>L</sub>= |
- A. 2πfL
- B. 1/2πfL
- C. 2πfL
- D. fL/2π
|
| 10 |
If I<sub>o</sub> is the peak value of current, then its root mean square value is given by |
- A.
- B. 2 I<sub>o</sub>
- C. I<sub>o</sub>
- D. 0.7 I<sub>o</sub>
|