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A 70 W light bulb operates on a potential difference of 75 V.
(a) Find the current in the bulb.
A
(b) Find the resistance of the bulb.
(c) If this bulb is replaced with one whose resistance is double the value found in part (b), is its power rating greater than or less than 70?
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
The magnetic flux that passes through one turn of a 18-turn coil of wire changes to 5.0 Wb from 14.0 Wb in a time of 0.020 s. What is the resistance of the wire
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The floor received most of the collision energy and the force of the ball on the floor is upwards.
A rectangular loop of N turns and of length a and width b is rotated at a frequency f in a uniform magnetic field B. What is the emf induced in the rectangular loop
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Find the mans rate of sweat production
A charged particle is moving horizontally westward with a velocity of 3.5 × 106 m/s in a region, What is the charge on the particle
A cubical piece of heat-shield tile from the space shuttle measures 0.11 m on a side and has a thermal conductivity of 0.059 J/(s m ·C°). How much heat flows from the outer to the inner surface of the tile in six minutes
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