Question

An electric motor takes 5 amperes current form a 220 volt supply line. Calculate the power of the motor and electric energy consumed by it in 2 hours.; An electric motor takes 5 amperes current form a 220 volt supply line. Calculate the power of the motor and electric energy consumed by it in 2 hours.

Answer 1

The power of the motor is 1.1 KW.

The electric energy consumed by motor in 2 hours is 2.2 Kwh.

Explanation:

Given:

An electric motor takes 5 amperes current form a 220 volt supply line.

Here, i = 5 ampere and v = 220 volts.

The power of the motor is given by

$p = v \times i$

$p = 220 \times 5$

$p = 1100 \: watts \: or \: 1.1 \: kilowatts$

The electric energy consumed by the motor is given by

$E = p \times t$

$E = 1.1 \times 2$

$E = 2.2 \: kwh$

Answer 2

Power Consumed is 1100 watts

Explanation:

• Given that electric current (I) = 5 A

• Potential Difference (V) = 220 V

&

• Time (T) = $2 hrs = 2 \times 60 \times 60 = 7200 sec$

Now, Power (P) is given by the expression

P = VI  

= $200 \times 5\ watts$

= 1100 watts

Now energy consumed by the motor

H = PT

= $1100 \times 7200 J$

= $7.92 \times 10^6 J$