10th Physics Chapter 5: Current Electricity
| Sr # | Questions | A | B | C | D |
|---|---|---|---|---|---|
| 1 | Which of the following statements is true regarding the combination of resistors in parallel? | The total resistance is always greater than the resistance of the largest resistor | The total resistance is always equal to the resistance of the smallest resistor | The total resistance is always less than the resistance of the smallest resistor | The total resistance depends on the values of individual resistors | 2 | Electromotive force (EMF) is defined as: | The force that causes the motion of electrons | The force that opposes the flow of current | The energy supplied per unit charge by a source of electrical energy | The energy dissipated as heat in a circuit | 3 | Which of the following materials exhibits Ohmic behavior over a wide range of conditions? | Copper | Semiconductor | Insulator | Superconductor | 4 | What safety measure should be taken while working with electrical circuits? | Touching live wires with bare hands | Overloading electrical outlets | Using insulated tools | Working with wet hands | 5 | What are the units of resistance? | Ohm | Ampere | Volt | Watt | 6 | Which of the following materials is an example of a non-Ohmic conductor? | Copper wire | Carbon filament in a light bulb | Silver wire | Aluminum wire | 7 | What is the effect of adding resistors in series on the total resistance of the circuit? | Increases | Decreases | Remains constant | Becomes zero | 8 | What should you do in case of an electrical fire? | Pour water on the fire | Use a fire extinguisher rated for electrical fires | Throw a blanket over the fire | Call an electrician immediately | 9 | What are the characteristics of an Ohmic conductor? | Resistance decreases with increasing current | Resistance is constant over a wide range of voltages | Resistance increases with increasing temperature | Current is inversely proportional to potential difference | 10 | Which of the following factors affects the resistance of a conductor? | Length of the conductor | Diameter of the conductor | Temperature of the conductor | All of the above | 11 | How does the resistance of a conductor change with an increase in its cross-sectional area? | Increases | Decreases | Remains constant | Becomes zero | 12 | When resistors are connected in parallel, the total resistance is: | Equal to the sum of individual resistances | Less than the resistance of the smallest resistor | Greater than the resistance of the largest resistor | Equal to the product of individual resistances |