Description : If 10 joules of energy are required to move 5 coulombs of charge between two points, the potential difference between the two points is equal to how many volts?
Last Answer : ANSWER: 2 VOLTS
Description : Electric current may be expressed in which one of the following units? w) coulombs/volt x) joules/coulomb y) coulombs/second z) ohms/second
Last Answer : ANSWER: Y -- COULOMBS/SECOND
Description : The potential difference across a 4 ohm resistor is 20 volts. Assuming that all of the energy dissipated by this resistor is in the form of heat, how many joules of heat are radiated in 10 seconds?
Last Answer : ANSWER: 1000 JOULES
Description : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` state of the hydrogen atom is
Last Answer : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` ... . 13.6 eV C. 6.8 eV D. 3.4 eV
Description : An object with a mass of 5 kilograms is a distance of 5 meters above the surface of the earth. If the acceleration due to gravity is 10 meters per second squared, the potential energy of the object relative to the ... is: w) 10 joules x) 20 joules y) 100 joules z) 250 joules e) none of the above
Last Answer : ANSWER: Z -- 250 JOULES
Description : Suppose a crane lifts a 900 kilogram wrecking ball 12 meters above a concrete slab. 105,840 Joules of potential energy are stored in the wrecking ball. Now the ball is dropped. When the ball is 6 meters above the concrete slab, what is it's potential energy in Joules?
Last Answer : ANSWER: 52,920 JOULES
Description : Which of the following units of energy is the smallest: w) calorie x) Joule y) erg z) electron-volt
Last Answer : ANSWER: Z -- ELECTRON-VOLT
Description : How many joules of work would be accomplished if you moved a 200-kg rock 10 meters?
Last Answer : 190
Description : A current of 5 amps passes through a 10 ohm resistor. How many joules of energy will be generated by this resistor in 2 seconds?
Last Answer : ANSWER: 500 JOULES
Description : As a 10 kilogram mass on the end of a spring passes through its equilibrium position, the kinetic energy of the mass is 20 joules. The speed of the mass is: w) 2.0 meters per second x) 4.0 meters per second y) 5.0 meters per second z) 6.3 meters per second
Last Answer : ANSWER: W -- 2.0 METERS PER SECOND
Description : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- 1)` volt, the resistance of the wire is
Last Answer : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- ... `(8 pm 1.5)Omega` D. `(8 pm 3)Omega`
Description : When the potential difference of 4 volt is applied across resistance, 10J energy is converted. Find the charge flows. a. 0.20 C b. 2.5C c. 5C d. 10C
Last Answer : b. 2.5C
Description : Which of the following is not a unit of energy? a.Joule b.kW c.N-m d.Electron volt e.Watt-hour
Last Answer : b. kW
Description : Which one of the following units represents the largest amount of energy? A. Electron volt B. Joule C. Erg D. Calorie
Last Answer : ANSWER: D
Description : An electron falls through a potential difference of `50,000 V`. What is the energy acquired by it?
Last Answer : An electron falls through a potential difference of `50,000 V`. What is the energy acquired by it?
Description : A body is moving with velocity 4 m/s , possesses 56 Joules of Kinetic Energy. The momentum of body will be equal to -Physics
Last Answer : (d) 28 kgms-1
Description : The Superconducting Super Collider will produce collisions with an energy of: w) 40 joules x) 40 MeV y) 40 TeV z) 200 TeV
Last Answer : ANSWER: Y -- 40 TeV
Description : The rate at which electrical energy is used is measured in w) volts x) amperes y) joules z) watts
Last Answer : ANSWER: Z -- WATTS
Description : A 10 kilogram object falls from a cliff 100 meters high. At the midpoint of its fall its total energy is: w) 2450 Joules x) 4900 Joules y) 10,000 Joules z) 20,000 Joules
Last Answer : ANSWER: Y -- 10,000 JOULES
Description : A car with a mass of 1000 kilogram is moving at a speed of 10 meters per second. The kinetic energy of the car is: w) 100 Joules x) 5000 Joules y) 10,000 Joules z) 50,000 Joules
Last Answer : ANSWER: Z -- 50,000 JOULES
Description : A 10 kilogram ball falls from a height of 5 meters and rebounds from the floor to a height of 3 meters. The energy lost by the ball is: w) 20 joules x) 98 joules y) 196 joules z) 294 joules
Last Answer : ANSWER: Y -- 196 JOULES
Description : The following particles move with same kinetic energy. Which of them has maximum momentum? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : (4) Alpha Particle Explanation: The formula for kinetic energy in terms of momentum for fundamental particles is basically just a quantized version of the classical formula, KE=(P^2)/2m, where KE is kinetic energy, p is momentum and m is the particle’s mass.
Description : The following particles move with same kinetic energy. Which of them has maximum momentum ? (1) Electron (2) Proton (3) Deutron (4) Alpha Particle
Last Answer : Alpha Particle
Description : A potential difference of V = 100 ± 2 volt, when applied across a resistance R gives a current of 10 ± 0.5 ampere.
Last Answer : A potential difference of V = 100 2 volt, when applied across a resistance R gives a current of 10 ... percentage error in R given by R = V/I.
Description : The potential difference in volt across the resistance `R_(3)` in the circuit shown in figure, is `(R_(1)=15Omega,R_(2)=15Omega, R_(3)=30Omega, R_(4)=
Last Answer : The potential difference in volt across the resistance `R_(3)` in the circuit shown in figure, is `(R_(1)=15Omega,R_(2 ... 5 B. `7.5` C. 15 D. `12.5`
Description : If 48 eV of energy is required to move a charge through a potential difference of 12 V determine the charge involved?
Last Answer : Need answer
Description : Define electron volt.
Last Answer : One electron volt is the energy gained by the electron when it is accelerated by applying a potential difference of one volt.
Description : An electron-volt is a measure of ____________________
Last Answer : energy
Description : A color television set employs a 25,000 volt electron accelerator to produce the picture and potentially harmful radiation which must be shielded against. The main component of this radiation consists ... which penetrate the picture tube x) soft x-rays y) microwaves z) ultraviolet radiation
Last Answer : ANSWER: X -- SOFT X-RAYS
Description : An electron falls through a potential differsence of `1000 V` and gives up `1.6 xx10^(-16) J` of energy. What is the charge on the electron?
Last Answer : An electron falls through a potential differsence of `1000 V` and gives up `1.6 xx10^(-16) J` of energy. What is the charge on the electron?
Description : If we move a positive charge to a positive plate, then potential energy of charge is A. decreased B. increased C. remains constant D. dissipated
Last Answer : increased
Description : A train locomotive whose mass is 1 x 106 kilograms is traveling EAST at a speed of 100 kilometers per hour. A NORTHERLY wind is applying a force of 100 Newtons on the locomotive. How much work is the wind doing ... 10 meters it travels? w) 0 joules x) 1,000 joules y) 10,000 joules z) 100,000 joules
Last Answer : ANSWER: W -- 0 JOULES
Description : A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine?
Last Answer : ANSWER: 4 WATTS
Description : Which of the following is correct? (a) Curved arrows are always drawn from an electron poor center to an electron rich center. (b) A doubled headed arrow means one electron has been moved. (c) ... rich center to an electron poor center. (d) A single headed arrow means two electrons have been moved
Last Answer : Curved arrows are always drawn from an electron rich center to an electron poor center.
Description : What term is used for the ability of a spot on a CRT screen to continue to glow after the electron bean has struck it and moved away?
Last Answer : Persistence.
Description : A potentiometer circuit is setup as shown. The potential gradient across the potentiometer wire is `k "volt"//cm` and the ammeter present in the circu
Last Answer : A potentiometer circuit is setup as shown. The potential gradient across the potentiometer wire is `k "volt"//cm` and ... (2)` D. `kl_(1)"and"kl_(2)`
Description : In a three-wire, 230/115 volt DC system, the potential between neutral and negative is _____________. A. 0 volts B. 115 volts C. 230 volts D. 460 volts
Last Answer : Answer: B
Description : The hook-on AC volt-ammeter consists essentially of a split-core and a rectifiertype instrument connected to the secondary winding of a _____________. A. potential transformer B. control transformer C. current transformer D. reactance transformer
Last Answer : Answer: C
Description : In a semiconductor diode, p-side is earthed and to n-side is applied a potential of -2 volt; the diode shall (a) Conduct (b) Not conduct (c) Conduct partially (d) Break down
Last Answer : a) Conduct
Description : The potential of standard hydrogen electrode (SHE) is conventionally fixed as a) 0.1 volt b) 0.0 volt c) 0.242 volt d) 0.34 volt
Last Answer : b) 0.0 volt
Description : What is the SI unit of electric current? (1) Amperes (2) Coulombs (3) Joules (4) Watts
Last Answer : (1) Amperes Explanation: The SI unit for measuring an electric current is the am pere, which is the flow of electric charge across a surface at the rate of one coulomb per second.
Description : Units of strain are A. Newton B. Joules C. Watt D. no units
Last Answer : no units
Description : Units of stress are A. Newton B. Joules C. Pascal D. Watt
Last Answer : Pascal
Description : A man picks up a 50 kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block? w) 1,000 joules x) 750 joules y) 500 joules z) 0 joules
Last Answer : ANSWER: Z -- 0 JOULES
Description : A kilocalorie is equal to one of the following. Is it equal to: w) 4.2 Joules x) 1000 Joules y) 4200 Joules z) 10,000 Joules
Last Answer : ANSWER: Y -- 4200 JOULES
Description : A machine having an efficiency of 50% does 500 joules of work. Which of the following is the work input? Is it: w) 500 joules x) 250 joules y) 1000 joules z) 2500 joules
Last Answer : ANSWER: Y -- 1000 JOULES
Description : A machine's output is 4000 joules and its frictional losses are 1000 joules. Which of the following is its efficiency? Is it: w) 25% x) 30% y) 75% z) 80%
Last Answer : ANSWER: Z -- 80%
Description : Units commonly used for entropy are: w) kilograms per degree Kelvin x) Joules per degree Kelvin y) Newtons per Coulomb z) ergs
Last Answer : ANSWER: X -- JOULES PER DEGREE KELVIN
Description : A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is: w) 5 Joules x) 20 Joules y) 49 Joules z) 200 Joules
Last Answer : ANSWER: Z -- 200 JOULES
Description : Hydraulic machines work under the Principle of : (1) Newton’s Law (2) Joules Law (3) Pascal’s Law (4) Floatation Law
Last Answer : Pascal’s Law