The circumference of a circular field is 207.24 yards. What is the diameter of the field? Use 3.14 for π and do not round your answer.
Answers
Answer:
Q. 1. Fill in the blanks
(5 x ½ = 2 ½)
1. _________ state of matter can undergo all the three thermal expansion.
2. _________ is the loudest sound tolerated by human ear.
3. We can replace electric bulb by __________ to conserve electricity.
4. A switch is connected to the _______ wire.
5. An instrument used to detect and measure the electric charges is called ______.
Q. 2. State whether the statements are true or false. Correct the wrong statement. (2)
1. Sagging of telephone and electric wires is due to superficial expansion.
2. Saxophone is an example of percussion.
3. The direction of flow of the conventional current in a circuit is from negative to
positive terminal of the cell.
4. A fuse is always connected in the live wire and in parallel with the electric circuit.
Q. 3. Define the following terms.
(1)
1. MCB
2. Thermal equilibrium
Q. 4. Match the following.
(2.5)
1. Thermoswitches. a.
Mouth organ
2. Ebonite. b.
Sitar
3. Reed instrument.
c.
Earth
4. Green colour. d.
Brass and iron
5. Tantu vadya. e.
Negative charges
Q. 5. Numerical Problems.
(2)
1. A vacuum cleaner is rated at 650 watt. How much electrical energy will it consume in
13 days if it is used for 1.5 hours daily?
2. There are 5 tube lights of 18 watt each, 3 fans of 60 watt each, a computer of 80 watt
and an air conditioner of 1 kW in an office. Calculate the electricity bill for the month
Step-by-step explanation:
Q. 1. Fill in the blanks
(5 x ½ = 2 ½)
1. _________ state of matter can undergo all the three thermal expansion.
2. _________ is the loudest sound tolerated by human ear.
3. We can replace electric bulb by __________ to conserve electricity.
4. A switch is connected to the _______ wire.
5. An instrument used to detect and measure the electric charges is called ______.
Q. 2. State whether the statements are true or false. Correct the wrong statement. (2)
1. Sagging of telephone and electric wires is due to superficial expansion.
2. Saxophone is an example of percussion.
3. The direction of flow of the conventional current in a circuit is from negative to
positive terminal of the cell.
4. A fuse is always connected in the live wire and in parallel with the electric circuit.
Q. 3. Define the following terms.
(1)
1. MCB
2. Thermal equilibrium
Q. 4. Match the following.
(2.5)
1. Thermoswitches. a.
Mouth organ
2. Ebonite. b.
Sitar
3. Reed instrument.
c.
Earth
4. Green colour. d.
Brass and iron
5. Tantu vadya. e.
Negative charges
Q. 5. Numerical Problems.
(2)
1. A vacuum cleaner is rated at 650 watt. How much electrical energy will it consume in
13 days if it is used for 1.5 hours daily?
2. There are 5 tube lights of 18 watt each, 3 fans of 60 watt each, a computer of 80 watt
and an air conditioner of 1 kW in an office. Calculate the electricity bill for the month