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Electric Circuits
The surface of a sphere of radius R carries an electric potential k cos 3, where k is a constant. Other
than a surface charge, no charge is present elsewhere. Find the electric potential everywhere.
than a surface charge, no charge is present elsewhere. Find the electric potential everywhere.
Electric Circuits
a certain platinum resistance thermometer has a change in resistance of 90.39 ohms when the bulb is placed in a tripple point cell.what temperature is defined if placed in an environment such that its resistance increases to 96.28 ohms?
Electric Circuits
Explain how does the resistivity of a conductor depend upon : (i) number density 'n' of free electrons, and (ii) relaxation time
Electric Circuits
Explain how electron mobility changes for a good conductor when :
1.) the temperature of the conductor is decreased at constant potential difference?
2.) applied potential difference is doubled at constant temperature?
1.) the temperature of the conductor is decreased at constant potential difference?
2.) applied potential difference is doubled at constant temperature?
Electric Circuits
A 2344 kg elevator can safely carry a maxi- mum load of 719 kg.
The acceleration of gravity is 9.81 m/s2 .
What is the power provided by the electric motor powering the elevator when the ele- vator ascends with a full load at a speed of 2.7 m/s?
Answer in units of kW
The acceleration of gravity is 9.81 m/s2 .
What is the power provided by the electric motor powering the elevator when the ele- vator ascends with a full load at a speed of 2.7 m/s?
Answer in units of kW
Electric Circuits
A 6.82 kg bowling ball moves at 4.29 m/s. How fast must a 2.36 g Ping-Pong ball move so that the two balls have the same kinetic
energy?
Answer in units of m/s
energy?
Answer in units of m/s
Electric Circuits
A rocket powered sled accelerate from rest,after time 10s it has traveled a distance x=400m.What is the speed in km/hour?
Electric Circuits
What is the weight on Earth of 240 kg of bricks?
Electric Circuits
A parallel plate capacitor is charged to a potential V , and stores an amount of charge Q it is then disconnected from the battery. The distance between the plates is then halved. What happens to (a) the charge on plate? the electric field? (c) the energy stored in the electric field?
Electric Circuits
how to determine eddy current value from applied voltage if frequency remains the same
