Home
Class 10
PHYSICS
A potential difference of 220 V is appli...

A potential difference of 220 V is applied across a resistance of 440 `Omega` in an electrical appliance. Calculate the current drawn and heat energy produced in 20 seconds.

Text Solution

Verified by Experts

V=220 V
R = 440 `Omega`
1=?
H =?
V= IR
`I = (V)/(R)`
`=(220)/(440)`
`=(1)/(2) = 0.5 A`
I =0.5
`H = I^(2) Rt`
`=(0.5)^(2) xx440xx20`
H =2200 J
Promotional Banner

Topper's Solved these Questions

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Short Answer Type Questions -II )|53 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Long Answer Type Questions )|29 Videos

  • ELECTRICITY

    OSWAAL PUBLICATION|Exercise TOPIC-2 ( Very Short Answer Type Questions )|11 Videos

  • LIGHT-REFLECTION AND REFRACTION

    OSWAAL PUBLICATION|Exercise NCERT CORNER (TEXTBOOK EXERCISES)|15 Videos

Similar Questions

Explore conceptually related problems

Calculate the current and resistance of a 100 W, 200V electric bulb.

Question: When a potential diffference of 2 V is applied across the ends of a wire of 5 m length, a current of 1 A is found to flow through it. Calculate : The resistance per unit length of the wire

Question: When a potential diffference of 2 V is applied across the ends of a wire of 5 m length, a current of 1 A is found to flow through it. Calculate : The resistance of 2m length of this wire

An electric iron of resistance 20Omega takes a current of 5A. Calculate the heat developed in 30s

A constant potential difference is applied across the ends of a wire. Which one of the following operations will reduce the rate of heat generation to half ?

An electric geyser rated 1500W, 250 V is connected to a 250v line mains. Calculate the electric current drawn by it, energy consumed by it in 50 hours and energy consumed if each unit coast Rs. 6.00.