| 1 |
The working principle of transformer: |
- A. Electromagnetic conduction
- B. Electrostatic induction
- C. Electric charge
- D. Neutralization
|
| 2 |
A,C electric supply at homes: |
- A. 240 volt
- B. 50 volt
- C. 220 volt
- D. 1000 volt
|
| 3 |
A device that decreases or increases the A.C voltage: |
- A. Transformer
- B. Ammeter
- C. Voltmeter
- D. Fuse
|
| 4 |
The conductors having larges resistance are called: |
- A. Fuses
- B. Switches
- C. Resistors
- D. Capacitors
|
| 5 |
V<sub>s</sub> / V<sub>p is equal to.</sub> |
- A. Vp / Vs
- B. Np / Ns
- C. Ns / Np
- D. None
|
| 6 |
Ammeter is used to. |
- A. Measure the current
- B. Detect the current
- C. Measrue the voltage
- D. None of them
|
| 7 |
The potential difference between tow paints in a circuit is measured by: |
- A. Galvanometer
- B. Ammeter
- C. Voltmeter
- D. Multi - meter
|
| 8 |
The potential of the neutral wire is. |
- A. Zero
- B. +220 volts
- C. 220 volts
- D. Changing
|
| 9 |
According to ohm's law , current and potential difference are: |
- A. Inversely proportional
- B. Directly proportional
- C. Equal
- D. Non of the above
|
| 10 |
Multi - meter is an instrument which can be used to measure: |
- A. Resistance
- B. Current
- C. Potential difference
- D. all of the above
|
