A 800 W electrical device is designed to work in 200 V- What will be its power the device is working in 100 V-

Question

Toppr Admin · Accepted Answer

Resistance of the appliance-R- -dfrac-V-2-P- - -dfrac-200 -times 200-800- 50 - -Omega-Power when connected in 100 V-P- -dfrac-V-2-R- -dfrac-100 -times 100-50- 200 - W-

A 800 W electrical device is designed to work in 200 V. What will be its power if the device is working in 100 V?

Resistance of the appliance

$$R= \dfrac{V^2}{P} = \dfrac{200 \times 200}{800}= 50 \ \Omega$$

Power when connected in 100 V

$$P= \dfrac{V^2}{R}= \dfrac{100 \times 100}{50}$$

$$= 200 \ W$$

A 800 W electrical device is designed to work in 200 V. What will be its power if the device is working in 100 V?

Resistance of the appliance$$R= \dfrac{V^2}{P} = \dfrac{200 \times 200}{800}= 50 \ \Omega$$Power when connected in 100 V$$P= \dfrac{V^2}{R}= \dfrac{100 \times 100}{50}$$$$= 200 \ W$$

Resistance of the appliance

$$R= \dfrac{V^2}{P} = \dfrac{200 \times 200}{800}= 50 \ \Omega$$

Power when connected in 100 V

$$P= \dfrac{V^2}{R}= \dfrac{100 \times 100}{50}$$

$$= 200 \ W$$