| 1 |
The heat produced by passage of current. |
- A. H=I<sup>2</sup>Rt
- B. H=IR2T
- C. H=I/Rt
- D. H=I<sup>2</sup>/Rt
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| 2 |
In carbon resistors, then value of Blue colour is. |
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| 3 |
What is the resistance of carbon resistor which has band brown black brown. |
- A. 100 Ohm
- B. 1000 Ohm
- C. 10 Ohm
- D. 1.0 Ohm
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| 4 |
In gas the charge carriers are: |
- A. Electrons
- B. Ions
- C. Both a & b
- D. None of above
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| 5 |
Drift velocity of electrons is. |
- A. 10<sup>-1</sup> m/s
- B. 10<sup>-2</sup> m/s
- C. 10<sup>-3</sup> m/s
- D. 10<sup>3</sup> m/s
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| 6 |
The fraction change in resistance per Kelvin is known as: |
- A. Temperature coefficient of Resistance
- B. Coefficient of voltage of change
- C. Thermal expansion
- D. All of the above
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| 7 |
For non-ohmic devices, the graph between V and I is |
- A. Not a straight line
- B. A straight line
- C. A curve
- D. All of above
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| 8 |
Magnetic effect of current is used in. |
- A. Toaster
- B. Electric iron
- C. Electric motor
- D. D.C. Battery
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| 9 |
Potentiometer is used to. |
- A. Compare emf of two cells
- B. Detect internal resistance of cell
- C. Measure P.D.
- D. All of these
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| 10 |
The drift velocity is of order: |
- A. 10<sup>-13</sup>m/s
- B. 10<sup>3</sup> m/s
- C. 10<sup>-3</sup>m/s
- D. 10<sup>-4</sup>m/s
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