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______ is the only non-metal that is a good conductor of electricity.
Concept: undefined >> undefined
If the area of cross-section of the conductor is doubled its resistance gets ______.
Concept: undefined >> undefined
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Three resistors are connected in series with a cell. If the current in each resistor is 1.5A, then the current through the cell will be ______.
Concept: undefined >> undefined
Three resistors are connected in parallel with a battery. If the current in each resistor is 2A, then the current through the battery will be ______.
Concept: undefined >> undefined
The ______ is the measure of opposition offered by the component to the flow of electric current through it.
Concept: undefined >> undefined
The process of conduction of electric current through the solution is called ______.
Concept: undefined >> undefined
A rheostat is also known as fixed resistance.
Concept: undefined >> undefined
Match the following:
| Column I | Column II | ||
| 1. | Resistor | a. | Galvanometer |
| 2. | Connecting wire | b. | Voltmeter |
| 3. | Current in an electric circuit | c. | Copper |
| 4. | Potential difference | d. | Constantan |
Concept: undefined >> undefined
Define the following:
Fixed resistor
Concept: undefined >> undefined
Define the following:
Variable resistor
Concept: undefined >> undefined
How can the speed of rotation of a coil be increased? Write at least three methods.
Concept: undefined >> undefined
The most suitable material for making permanent magnets is ______.
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The moving part of an electric motor is called ______.
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Define electric motor.
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The incident ray passing through ‘F of a mirror ______ after reflection.
Concept: undefined >> undefined
The incident ray passing through C of a mirror ______ after reflection.
Concept: undefined >> undefined
The incident ray is parallel to the principal axis of a mirror and ______ after reflection.
Concept: undefined >> undefined
All distances parallel to the principal axis are measured from the ______ of the
mirror.
Concept: undefined >> undefined
The angle of incidence is zero if a ray of light is incident normal to be surface separating the low media.
Concept: undefined >> undefined
What are the three scales of temperature?
Concept: undefined >> undefined
