What is the equation for calculating electric power?

Answers

Answer 1

Answer: Power consumed by an electric device, or dissipated as heat, is

Power = (voltage between the ends of the device) x (current through it)

Answer 2

Answer: The equation for calculating electric power is given by the folloowing equation : -

P = VI

Where P stands for power, V for potential difference and I for current.

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Which statement best explains the relationship between the electric force between two charged objects and the distance between thema) As the distance increases by a factor, the electric force increases by the square of that factor. b) As the distance increases by a factor, the electric force increases by twice that factor. c) As the distance increases by a factor, the electric force decreases by twice that factor. d) As the distance increases by a factor, the electric force decreases by the same factor. e) As the distance increases by a factor, the electric force decreases by the square of that factor.

What is required to cause acceleration?

Answers

F = ma

Where m = mass of body, a = acceleration.

F = ma = m(v - u)/t

So for an acceleration to occur, a force is required.

Also a change of velocity is required for acceleration to occur.

The horizontal sweep of an oscilloscope is rated ina. volts/division
b. amps/division
c. seconds/division
d. ohms/divisionthe horizontal sweep of an oscilloscope is rated in seconds/division.

Answers

C is the correct answer

Answer:

Second division

Explanation:

A 15 cm3 block of gold weighs 2.8 N. It is carefully submerged in a tank of mercury. One cm3 of mercury weighs 0.13 N. a. Will the mercury be displaced by the gold?
b. Will the gold sink or float in the mercury?

Answers

The density of gold is 2.8 N / 15 = 0.18 units
The density of mercury is 0.13/1 = 0.13 units

Since the density of gold is more than density of mercury, it will sink.
Since the gold will sink, it will displace mercury, but less than its own volume

36 The height of a 30-story building is approximately(1) 10^0 m (3) 10^2 m
(2) 10^1 m (4) 10^3 m

Answers

An approximation used to measure building height is 10 feet per building level.

Converting from feet to meters using the equation:
1 ft = 0.3048m
10 ft = 3.048m

Multiplying that by 30 storeys, we get:
3 x 3.048m = 91.44m, which is near the answer of (3) 10^2 m or 100m.

Select the statement which are true for current, voltage and resistance: A. As resistance increases, current also increases.
B. Current is directly proportional to voltage.
C. As resistance increases, current decrease.
D. If the voltage of a bulb is 12 V, and the resistance is 4 ohms, then the current must be 5 A.

Answers

Answer:

Explanation:

Current is directly proportional to voltage and inversely proportional to the resistance.

The statement that is true is:

B. Current is directly proportional to voltage.

and

C. As resistance increases, current decreases.

Energy is measured in watts and work is measured in joules. true or false?

Answers

it's true
work measure by joule.
Energy = work/time
= joule/s .
and joule/s represents watt

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