3 years ago

2. A 60 W filament lamp is powered by the 240 V mains electricity supply.

Physics

1 answer:

mojhsa [17]3 years ago

8 0

Answer:

I(current)=0.25A

R (resistance)=960ohms

Explanation:

1.)

P=60W

V=240V

I=?

Power= Current× Potential difference

P=IV

substitute 60 for P and 240 for V

60=I×240

I=60÷240

I=0.25A

Therefore, I=0.25A

2.) V=IR

Substitute 240 for V and 0.25 for I

240=0.25×R

R=240÷0.25

R=960W

Therefore, R=960W

You might be interested in

An athlete prepares to throw a 2.0-kilogram discus. His arm is 0.75 meters long. He spins around several times with the discus a

wlad13 [49]

Centripetal Force (Fcp) = ?

His arm length = Radius (R) = 0.75 m

Discus velocity = Linear Velocity (V) = 5 m/s

Discus mass (m) = 2 kg

Centripetal Acceleration (Acp) = V^2/R or W^2 x R
In this case i will use the V^2/R formula, because it uses the discus velocity (V).

$fcp = m \times acp \\ fcp = m \times {v}^{2} \div r \\ fcp = 2 \times {5}^{2} \div 0.75 \\ fcp = 2 \times 25 \div 0.75 \\ fcp = 50 \div 0.75$
$fcp = 66.666... = 66 \: newtons$

Answer: Last option, 66 N.

7 0

3 years ago

Read 2 more answers

a man exerts 3000.00N of force to push a car 35.00 meters in 90.00 seconds.... 1. what is the work done 2.what is the power gene

vaieri [72.5K]

1). Work = (force) x (distance)

Work = (3,000 newtons) x (35 meters) = 105,000 newton-meters = 105,000 joules

2). Power = (work) / (time)

Power = (105,000 joules) / (90 seconds)
= 1,166-2/3 joules per second = 1,166 and 2/3 watts .

Note:
That's no ordinary man.
1,166 watts is the same as roughly 1.6 horsepower.
Not too many people can sustain 1 horsepower or more for 90 seconds.

4 0

4 years ago

Matter can be classified as elements, compounds, and mixtures. Choose all of the elements from the following examples of matter.

trapecia [35]

Answer: gold ,oxygen magnesium

Explanation:

we cannot conclude air because it is mixture of gases , blood is also mixture of plasma , thrombocyte ; co2 is a compound ,

7 0

3 years ago

Which component measures the potential difference across a branch in a circuit? A. switch B. resistor C. ammeter D. voltmeter

NNADVOKAT [17]

Answer:

Voltmeter

Explanation:

7 0

3 years ago

While sitting in a boat, a fisherman observes that 2 complete waves pass by his position every 4 seconds. What is the period of

Bad White [126]

Answer:

Explanation:

Because 2 waves 4 secs means 1 in 2s

7 0

3 years ago