| 1 |
If the change of current in a circuit induces a current in another circuit, this phenomena is known as: |
- A. Self induction
- B. Mutual induction
- C. Electromagnetic induction
- D. None mutual induction
|
| 2 |
A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be: |
- A. 0 volt
- B. 30 volts
- C. 45 volts
- D. 60 volts
|
| 3 |
According to Fleming's left hand rule the direction of force on the conductor is given by: |
- A. Thumb
- B. Fore finger
- C. Middle finger
- D. None of these
|
| 4 |
<p class="MsoNormal">The ray of light after reflection from concave mirror passes
through:<o:p></o:p></p> |
- A. <p class="MsoNormal">Centre<o:p></o:p></p>
- B. <p class="MsoNormal">Principal focus<o:p></o:p></p>
- C. <p class="MsoNormal">Pole<o:p></o:p></p>
- D. <p class="MsoNormal">Radius<o:p></o:p></p>
|
| 5 |
When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is: |
- A. The same as direction of field
- B. Opposite the direction of field
- C. Makes an angle of 45<sup>o</sup>with the current
- D. At right angle to both the field and the current.
|
| 6 |
<p class="MsoNormal">Optical fibres works on the principle of:<o:p></o:p></p> |
- A. <p class="MsoNormal">Reflection<o:p></o:p></p>
- B. <p class="MsoNormal">Refraction<o:p></o:p></p>
- C. <p class="MsoNormal">Total internal reflection<o:p></o:p></p>
- D. <p class="MsoNormal">Diffraction<o:p></o:p></p>
|
| 7 |
Electric motor converts electrical energy into: |
- A. Chemical energy
- B. Solar energy
- C. Heat energy
- D. Mechanical energy
|
| 8 |
<p class="MsoNormal">Bouncing back of light after striking the surface is called:<o:p></o:p></p> |
- A. <span style="font-size:11.0pt;line-height:107%;
font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin;
mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language:
EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Refraction</span>
- B. <p class="MsoNormal">Reflection<o:p></o:p></p>
- C. <p class="MsoNormal">Diffraction<o:p></o:p></p>
- D. <p class="MsoNormal">Interference<o:p></o:p></p>
|
| 9 |
<p class="MsoNormal">One micro coulomb charge is equal to:<o:p></o:p></p> |
- A. <p class="MsoNormal">10<sup>-3</sup>c<o:p></o:p></p>
- B. <p class="MsoNormal">10<sup>3</sup>c<o:p></o:p></p>
- C. <p class="MsoNormal">10<sup>6</sup>c<o:p></o:p></p>
- D. <p class="MsoNormal">10<sup>-6</sup>c<o:p></o:p></p>
|
| 10 |
A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage. |
- A. 0 V
- B. 30 V
- C. 45 V
- D. 60 V
|