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प्रश्न
State two differences between the e.m.f. and terminal voltage of a cell.
State the differences between terminal voltage and emf.
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उत्तर
| Sr. No. | e.m.f. of cell | Terminal voltage of cell |
| 1. | The amount of work required to move a unit positive charge in the entire circuit, both inside and outside the cell, serves as the measurement. | The amount of work required to move a unit of positive charge outside the cell serves as the measurement. |
| 2. | It is the characteristic of the cell, i.e., it does not depend on the amount of current drawn from the cell | It depends on the amount of current drawn from the cell. The more current drawn from the cell, the lower the terminal voltage. |
| 3. | It is equal to the terminal voltage when the cell is not in use and greater than the terminal voltage when the cell is in use. | It is equal to the cell's EMf when it is not in use, while it is less than the EMf when it is in use. |
संबंधित प्रश्न
If the current through a floodlamp is 5 A, what charge passed in 10 seconds?
(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
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Are the lamps in series or parallel?
(a) Are the lamps in series or parallel?
(b) The student has made a mistake in this circuit. What is the mistake?
(c) Draw a circuit diagram to show the correct way to connect the circuit. Use the proper circuit symbols in your diagram.
In the circuit diagram given below, three resistors R1, R2, and R3 of 5 Ω, 10 Ω and 30 Ω, respectively are connected as shown
Calculate:
- current through each resistor.
- total current in the circuit.
- total resistance in the circuit.
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- Which circuit would have the highest voltage across each bulb?
- In which circuit would the bulbs be brighter?
- In which circuit, if one bulb blows out, all others will stop glowing?
- Which circuit would have less current in it?
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Tell the odd one out. Give a proper explanation.
What is the function of a step-up transformer?
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- What is its resistance?
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