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EXERCISES
A. VERY SHORT-ANSWER QUESTIONS : Answer in one-word
Q. 1. What kind of current is generated by a dry cell ? Ans. Direct current.
Q. 2. Name a device that directly converts solar energy into electrical energy.
Ans. Photovoltaic cell.
Q. 3. Name the ‘on-off’ mechanism in any electrical circuit. Ans. Switch.
Q. 4. Which material is used for making the handle of a screw driver and pliers ?
Ans. Insulator.
Q. 5. Name the material that is commonly used for making electric wires and cables.
Ans. Copper metal.
A. SHORT-ANSWER QUESTIONS : Answer in 10-15 words
Q. 1. How are the cells connected in a torch ? What is such a combination called ?
Ans. In a torch, the cells are connected in such a way that the positive terminal of the first cell is connected to the negative terminal of the other cell.
Such a combination of cells is called series combination.
Q. 2. What is meant by a closed electrical circuit ?
Ans. The circuit in which electric current flows from one terminal of cell or battery to the other, is called a closed circuit.
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