EASY
9th CBSE
IMPORTANT
Earn 100

At what rate is electrical energy consumed in a 60 W bulb?

Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 10

Establish a relationship between S.I. unit and commercial unit of energy.

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 11
Define 1 watt.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 11
An electric bulb of 60 W is used for 6 hours per day. Calculate the units of energy consumed in one day by the bulb.
HARD
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 12
Calculate the electricity bill amount for a month of April if 4 bulbs of 40 W for 5 hour, 4 tube-light of 60 W for 5 hour, a TV of 100 W for 6 hour, a washing machine of 400 W for 3 hour are used per day. The cost per unit is 1.80
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>NCERT Exemplar Problems>Q 1
When a body falls freely towards the earth, then its total energy.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>NCERT Exemplar Problems>Q 2
A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>NCERT Exemplar Problems>Q 3
In case of negative work the angle between the force and displacement is
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>NCERT Exemplar Problems>Q 4
An iron sphere of mass 10 kg has the same diameter as an aluminum sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same