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As the chain is raised, assuming that the motor supplies a constant force, describe in a sentence or two how the motion of the anchor changes. Sketch a rough position versus time and velocity versus
A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?
The balance point of the cell in open circuit is 76.3 cm. When a resistor of 9.5 Ω is used in the external circuit of the cell, the balance point shifts to 64.8 cm length of the potentiometer
Determine the value of X. What might you do if you failed to find a balance point with the given cell of emf ??
A secondary cell after long use has an emf of 1.9 V and a large internal resistance of 380 Ω . What maximum current can be drawn from the cell? Could the cell drive the starting motor of a car?
In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0 cm, what is the
What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?
A which settles after a few seconds toa steady value of 2.8 A. What is the steady temperature of the heating element if the room temperature is 27.0 °C? Temperature coefficient of resistance of
What is the resistivity of the material at the temperature of the experiment?
A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery?
A coffee-maker contains a heating element that has a resistance of 44 Ω. This heating element is energized by a 120-V outlet. What is the current in the heating element?
The plane of coil is rotated from a position where it makes an angle of 32.0 degrees with a magnetic field of 1.20T to a position perpendicular to the field. The rotation takes 7.00*10^-2s. What is
A small sphere of radius r1 and charge q1 is enclosed by a spherical shell of radius r2 and charge q2. Show that if q1 is positive, charge will necessarily flow from the sphere to the shell (when th
When it is connected to an ac source with an rms output of 12 V and a frequency of 60.0 Hz, the current drops to 2.0 A. a) Find the impedance of the circuit at 60.0 Hz. (don't forget about the
Describe schematically the equipotential surfaces corresponding to" (a) a constant electric field in the z-direction,
Determine the capacitance of the system and the potential of the inner cylinder. Neglect end effects (i.e., bending of field lines at the ends).
An inductor with an inductance of 2.90H and a resistor with a resistance of 6.00 Ohms are connected to the terminals of a battery with an emf of 5.00V and negligible internal resistance. A) Find th
A 10-m-by-14-m house is built on a 12-cm-thick slab of concrete. What is the rate of heat loss through the slab if the ground temperature is 5.00° C while the interior of the house is 22.0°
3.11 x 1016 electrons are passing from left to right through a wire every seconds. What is the current in that wire, in Amps? Please use a positive sign to indicate that the current is flowing to th
The surface absorbs half of the energy and reflects half. The speed of light is 2.99792 × 108 m/s. a) Calculate the total energy absorbed by the surface in 1.1 min. Answer in units of J.
What is the radius r for which the radiation force of repulsion just balances the gravitational force of attraction to the sun?
A slide projector needs to create a 98-cm-high image of a 2.0 cm slide. The screen is 300 cm from the slide. What focal length does the lens need? Assume that it is a thin lens. How far should you
A second coil with 410 turns is wound uniformly on top of the first. What is the mutual inductance of these coils?
If 3.43 moles of this gas undergoes isothermal expansion at T = 216K from a volume of 1.00 m³ to 3.00 m³, calculate the work done by the gas.