Question

17. If one 60w bulb is connected with 240 volt line, the amount of current is
amp
a) 0.25
b) 0.4
c) 2.5
d) 4.5​

Answer 1

Option A

Given that,

➜ Power of the Bulb = 60 W

➜ Potential Difference of the circuit line = 240 V

We need to find the current drawn by the bulb.

Using the formula:

⇒ Power = V × I

Where,

• V = Potential Difference
• I = Current

⇒ 60 = 240 × I

⇒ I = 60/240

⇒ I = 1/4

⇒ I = 0.25 A

Hence, Option (a) is correct.

More Information :-

☛ Potential Difference is the difference between the electric potential ( which is equal to the amount of work done in moving a unit charge from infinity to that point ) of two points.

V = I R

Where,

• I = Current
• R = Resistance

☛ Power is the amount of energy consumed per unit time.

In terms of electricity,

Power = V × I

and,

Total Energy consumed for a time t, E= P × t

Where, P = Power

Answer 2

$\bf \huge \red {answer : }$

we know that:

$\bf \huge \fbox \green{ \: V \: = \: IR \: }$

V=Voltage (or) potential difference

I=Current

R=Resistance

Multiplying both side by I

VI=I×IR

P=I×V

So,

$\bf \huge \fbox \pink{ \: \: I \: = \: \: \frac{P}{V} \: \: }$

$\bf \huge \implies \frac{60}{240} w \: \: \\ \\ \bf \huge \implies0.25 \: ampere$