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A 12 Volt battery (a real emf source) is connected to a light bulb rated to consume 48Watt at 12Volt. The current flowing through the filament of the light bulb is measured to be 3.0 Amp.
Obtain the internal resistance and terminal voltage of the battery.
Find is this battery a good match for the light bulb? Why?
a body of 2kg is suspended from the ceiling of an elecator moving up with an accelration g. find the apparant weight of
The nucleus of the hydrogen atom has a radius of about 1.1x10^-15 The electron is at a distance of about 5.29 Ã- 10-11 m from the nucleus. compute the volume of the atom
A parallel plate capacitor of capacitance 4.3 µF has the space between the plates filled with a slab of glass with ? = 3.9. Find the capacitance after the glass is removed
An electron beam is accelerated during a potential of 5.0 kV such that the electrons all have essentially the same speed in the same direction. Compute the DeBroglie wavelength for the electrons.
A woman on a bridge 90.0 m high sees a raft floating at aconstant speed on the river below. She drops a stone fromrest in an attempt to hit the raft. Find the speed of the raft
A heating element in a stove is designed to dissipate 3200 W of heat when it is connected to 245 V. Assuming that the resistance is constant, calculate the current in this element if it is connected to 115 V.
An L-R-C series circuit, R= 160 Ω, L= 0.700 H, and C= 1.90×10-2 μF. The source has a voltage amplitude of 160 V and a frequency equal to the resonance frequency of the circuit. what is the average power delivered by the source
A clock has a second hand whose tip rubs against the inside of the glass cover. what is the minimum torque that must be applied to the second hand
a shaving or makeup mirror is a large concave mirror. in terms of its focal length f what is the range of distances
the block diagram of the control of an electric heating system. the heater is driven from a voltage-controlled power
A refrigerator requires 10 J of work and exhausts 70 J of heat per cycle. What is the refrigerator's coefficient of performance
A particle is traveling in a straight line at a constant speedof 25.0 m/s. Suddenly, a constant force of 15.0 N acts on it, bringing it to a stop in a distance of 62.5 m. (a) What is the direction of the force? (b) Determine the time it takes for ..
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