What is the emf of the battery

Assignment Help Physics
Reference no: EM13558193

When a light bulb is connected across the terminals of a battery, the battery delivers 20 W ofpower to the bulb. A voltage of 12.8 Vexists between the terminals of the battery, which has an internalresistance of 0.14 Ω. What is the emf of the battery?

Reference no: EM13558193

Questions Cloud

What is the average voltage-what is the rms voltage : An AC generator produces a sinusoidal voltage at 60 Hz with amaximum of 120 V. What is the average voltage? What is the rms voltage?
Electric force on dust particle-equal to weight of particle : A small piece of dust ofmass m = 4.7 µg travels through an electric aircleaner in which the electric field is 527 N/C. The electric force on the dust particle is equal to the weight of the particle. What is the charge on the dust particle?
A source emits sound uniformly in all directions : A source emits sound uniformly in all directions. A radial line isdrawn from this source. On this line, determine the radialpositions of two points, 1.28 m apart, such that the intensitylevel at one point is 2.46 dB greater than that at the other.
A spider hangs from a strand of silk whose radius : A spider hangs from a strand of silk whose radius is5.8x10-6 m. The density of the silk is 1100kg/m3. When the spider moves, waves travel along the strand of silk at a speed of 310 m/s. Determine the mass of the spider.
What is the emf of the battery : When a light bulb is connected across the terminals of a battery, the battery delivers 20 W ofpower to the bulb. A voltage of 12.8 Vexists between the terminals of the battery, which has an internalresistance of 0.14 Ω. What is the emf of the battery..
The bremsstrahlung x-ray spectrum of both moand w cut off : The bremsstrahlung x-ray spectrum of both Moand W cut off (have zero intensity) at about 0.035 nm. X rays with this wavelength are produced by the target element when bombarding electrons are promptly stopped in a single collision and give up all ..
A car-moving along a straight stretch of high-way : A car, moving along a straight stretch of high-way, begins toaccelerate at 0.0345 m/s2. It takes the car 70.9 s to cover 1 km.How fast was the car going when it first began to accelerate?
Spring is standing upright-what is the oscillation frequency : A spring is standing upright on a table with its bottom end fastened to the table. A block is dropped from a height 4.4 cmabove the top of the spring. The block sticks to the top end of thespring and then oscillates with an amplitude of 13 cm.
The total equivalent resistance between the terminals : A 5.0 Ω resistor is connected in series with a10.0 Ω resistor. This combination is thenconnected in parallel with a 7.5 Ω resistor. Thethree resistor network is then connected in series with a15 Ω resistor. T

Reviews

Write a Review

Physics Questions & Answers

  Find the angle counterclockwise relative to the horizontal

find the angle counterclockwise relative to the horizontal.

  What is the rms value of the electric field at that distance

A spherically symmetric electromagnetic wave is emitted by a 1030 W source. What is the rms value of the electric field at that distance

  What must be the tension of string to produce desired effect

You have designed a new musical instrument of very simple construction. Your design consists of a metal tube with length L and diameter L/10. What must be the tension of the string to produce the desired effect

  Estimate the normal force exerted by the floor on each hand

Assume L1 = 0.844 m and L2 = 0.401 m. Calculate the normal force exerted by the floor on each hand

  Calculate the pressure exerted on the floor by the heel

As a woman walks, her entire weight is momentarily placed on one heel of her high-heeled shoes. Calculate the pressure exerted on the floor by the heel

  What is the speed of the electron in its orbit

Consider a model of a hydrogen atom in which an electron is in a circular orbit of radius = 5.79×10?11 around a stationary proton. What is the speed of the electron in its orbit?

  What is the effective nuclear charge experienced

The energy for the 5P valence electron in indium (Z=49) is -5.79 electron volts. What is the effective nuclear charge experienced by this electron

  What is the average net force exerted by the ball

A 3.0 kg mud ball drops from rest at a height of 10 m. what is the average net force exerted by the ball

  What is the effect of thermal insulation on cooling

What is  the effect of thermal insulation on cooling

  Calculate the electric potential half way

For two concentric conducting rings the inner of the large ring in 12 cm and the outer radius of the smaller ring is 4 cm, Calculate the electric potential half way between the two rings 8 cm away from the center of the rings

  What are the magnitude and direction of daniels velocity

Two ice skaters, Daniel (mass 65.0 kg) and Rebecca (mass 45.0kg), are practicing, What are the magnitude and direction of Daniel's velocity after the collision

  Find the horizontal distance from press box to second base

The press box at a baseball park is 40.0 above the ground. find the horizontal distance from the press box to second base

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd