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3 years ago

11

A circuit has two batteries and a resistor as shown. In the figure, the terminal voltage of the 12 V battery is closest to _____

.
a. 15.6 V
b. 13.2 V
c. 8.4 V
d. 10.8 V
e. 9.6 V

1 answer:

Andrei [34K]3 years ago

7 0

Answer:

a 15.6voltz

i Hope this helps

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3. $f = 0.067 Hz$

4. $t = 4 s$

Explanation:

1. The frequency of rotation is given by:

$f = \frac{\omega}{2\pi}$

Where:

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$\omega = \frac{50 rev}{25 s}*\frac{2\pi rad}{1 rev} = 4\pi rad/s$

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$f = \frac{4\pi rad/s}{2\pi} = 2 Hz$

2. The frequency is:

We know:

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3. The frequency of the pendulum is:

$f = \frac{\omega}{2\pi} = \frac{\frac{1 rev}{15 s}*\frac{2\pi rad}{1 rev}}{2\pi} = 0.067 Hz$

4. We have:

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The time can be calculated as follows:

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Read 2 more answers

Work out the current through a television with a power of 0.8 kW if it uses the 230 V mains supply. Give your answer to 1 decima

Y_Kistochka [10]

Answer:

the current is 3.5 A

Explanation:

The computation of the current is shown below:

As we know that

Current [A] = Electrical power [W] ÷ Potential difference [V]

Now convert KW TO W = × 1000

So, the current is

= 800W ÷ 230V

= 3.5 A

Hence, the current is 3.5 A

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