Question

EASY 1. A group of two or more cell is called a ------------- (circuit, battery, current) 2. A device that breaks the circuit is called --------- (electro magnet, switch, fuse) 3 Name two appliances that use electromagnets 4 Does current carrying wire has a magnetic effect around it? Yes or No. AVERAGE 5. A utensil manufacturer wants to purchase materials that can be used to make handles of pots, pans and woks generally used in the kitchen. He collects equal sized pieces many types of materials and puts them in a chamber already heated to 100 0C. The diagram shows the temperature of the different materials after 10 minutes of resting in the hot chamber. Chamber heated at 1000 C Which four materials are most suitable for production of the handles and why? ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------- On the basis of the observations, tick the correct option for each material Material Good conductor of heat Bad conductor of heat 1 2 3 4 5 6 7 8 6. Draw a circuit diagram using symbols to represent the circuit Shown in fig. 7. Iron man wears an awesome ironsuit. He is flying over high current carrying wire. Will he be affected? DIFFICULT 8. The fuse wire reduces the danger of fire in a building. Give reason for the statement. 9. It is a well-known fact that on supplying heat, land absorbs heat and heats up faster than water. Land also cools down faster than water by giving away the heat absorbed. During the day, the land is hot while the sea is cool. During the night, the land is cool while the sea is warm. Observe the two situations given below and answer the given questions i. Which lighthouse will be warmer during the day time and why? ii. Which lighthouse will be warmer during the night time and why? ---------------------------------------------------------------------------------------------------------- 10. Identify the three methods of heat transfer seen in the given image.

Answer 1

Answer:

A group of two or more cell is called a battery

A device that breaks the circuit is called fuse

Answer 2

Answer:

BATTERY

FUSE

ELECTRIC BELL

USED IN TELEVISION, RADIO

NO