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Electric Circuits
A 1.5V cell supplies 0.20A to a lamp for seven hours before the lamp goes out.
What is a sensible estimate for the initial chemical energy content of the cell?
What is a sensible estimate for the initial chemical energy content of the cell?
Electric Circuits
An elevator accelerates upward at 3m/s2 for a brief time. A 500 N woman standing on bathroom scales notices the reading is not what she expected. What fo the scales read?
Electric Circuits
If the current in the electric bulb decreases by 20% then the power in the bulb decreases by
Electric Circuits
A current of 4.8 A is flowing in a conductor. The number of electrons/second moving through any cross-section normal to direction of flow is
Electric Circuits
Two points A and B are 85cm north and 60cm west of a point charge of −4510−3C respectively. Calculate the potential difference between A and B
Electric Circuits
A boy is pushing a chair by applying a force of 5 newtons. His mother helps him push it faster by applying an additional force of 7 newtons in the same direction. What is the net force acting on the chair?
Electric Circuits
Derive expressions for potential energy and kinetic energy of an oscillating spring-mass
system.
system.
Electric Circuits
Is average speed the magnitude of average velocity?Justify your answer with a suitable example.
Electric Circuits
Electrons cannot be accelerated by cyclotron.Why?
Electric Circuits
a)how will you convert a galvanometer of resistance 150 ohm giving a full scale deflection for a current 3 milli ampere to an ammeter of range 0 to 6A(a uniform resistance wire of length 60 cm and 2 ohm is given)Find the length of the wire required?
