You have received a letter from your pen friend in which they write that their mum has added them as a friend on social network they use.Your pen friend feels embarrassed about the situation and is unhappy that their mum comments on every new picture they post. Write an answer to them in which you

1. The ohmmeter is used to measure the value of resistance while it is connected in paralltl to the resistor.

2. The ammeter is connected in series while the current is being measured.

3. While the value of current in the circuit is measured, the ammeter should be connected in series.

1. Suppose the ammeter scale reads 1.9 amp, the voltmeter scale reads 2.4 V; how much is the value of resistance in the measured circuit?

R = U / I = 2.4 / 1.9 = 1.26 Ohm

2. Suppose the ohmmeter scale reads 75 ohms, the voltmeter scale reads 220 V; how much is the value of current in the measured circuit?

I = U / R = 220 / 75 = 2.9 A

3. Suppose that you have a series circuit consisting of three resistors and a voltage source. R1 = 0.18 ohm, R2= 1.15 ohms, R3 = 2 ohms, I=10 amp. Find the voltage drop across each resistor; find the value of voltage in the circuit.

U1 = R1 * I = 0.18 * 10 = 1.8 V  

U2 = R2 * I = 1.15 * 10 = 11.5 V

U3 = R3 * I = 2 * 10 = 20 V

Suppose R1 gets open. What does it result in? I = 0

4. Two resistors are connected in series. R1 = 7,000, R2= 2,200, I = 110 amp. Find the voltage drop across each resistor.

U1 = R1 * I = 7,000 * 110 = 770,000 V  

U2 = R2 * I = 2,200 * 110 = 242,000 V

Suppose no current passes through the circuit, what does it result from?

It results from the broken circuit.

1. Jane said she was happy, because her brother had won the prize on the competitions.

2. The teacher said to her pupils that it would be winter soon and snow would cover the ground.

3. Nary said that she had been waiting for Jim at the station, but he had not come.

4. Ann said that she had been at school the day before and had done all those tests.

5. Mother promised to her said that they should go to the sea the following summer.

6. John asked me what i was going to do that evening.

7. Mr.Dickson said that i hadpaid a lot of money for the car.

8. Tim said that he could read English newspapers without dictionary.

9. The teacher asked why i had not come in time at his lessons.

10.Professor Brown asked his stident to speak English correctly.

11. отсутствует часть предложения

12. She asked Bob how long you had been livivng in St. Petersburg.