29. III A typical helium-neon laser found in supermarket checkout scanners emits 633-nm-wavelength light in a 1.0-mm-diameter beam with a power of 1.0 mW. What are the amplitudes of the oscillating electric and magnetic fields in the laser beam?

Q: An object is undergoing simple harmonic motion. Which of the following statements are true,…

A: In simple harmonic motion, the velocity is maximum at the position, x = 0 v(t) is maximum at a(t) =…

Q: metal can ______ electricity . electrons travel through ______ allowing us to do work . ____ cells…

A: metal can conduct electricity. electrons travel through a wire allowing us to do work.

Q: 19-5 A typical Pb-acid automobile battery weighs 20 kg. Compare the amount of energy it stores when…

A: Given : Weight of Pb acid battery = 20kg

Q: Describe experiments to demonstrate good and bad conductors of heat

A: Take a rod of that material and stick some wax balls on the rod such that they are equidistant from…

Q: (B) If electrical energy were used, how much would this cost at 38¢ per kWh?

A:

Q: How gas generator work?

A: Generators don't actually create electricity. Instead, they convert mechanical or chemical energy…

Q: The unit of energy is S. I. units is

A: Joule

Q: Write the function of voltmeter in an electric circuit.

A:

Q: There are two very similar capacitors space between its plate's capacitance C1 = C2 = 4.00 uF.…

A:

Q: The potential difference required to pass a current 0.5 A in a wire of resistance 20W is 10V 0.01V O…

A:

Q: If an electric iron of 1200 W is used for 30 minutes everyday, find electric energy consumed in the…

A:

Q: A space heater primarily converts electrical energy into O light energy O thermal energy O sound…

A:

Q: How much current does a 240 W car AC draws from its 12-V electrical system ?

A: power of AC of car = 240 W potential drawn from the electrical system = 12 volts

Q: How much energy is necessary to heat 8.0 kg of water from room temperature ( 20 degrees Celsius) to…

A: Given  Mass of water m=8kg Room temperature Ti=200 C Boiling temperature Tf=1000 C Specific heat…

Q: The rate at which electric energy is consumed by a device is its

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Q: Part A How much charge flow through the hair dryer in 2.0 min ? Express your answer using two…

A:

Q: an electric car be for the enviro

A: Beneficial can an electric car be for the environment:-  There are some benefits of the Electric car…

Q: List the differences and similarities between conductors and insulators?

A: The difference between conductor and insulator are as follows:- 1) The main difference between them…

Q: 125 V 20 Q 100 Q 50 Q

A: Given data:  Three resistors are connected in parallel  R1 = 20 Ω, R2 = 100 Ω and R3 = 50 Ω…

Q: Why are some appliances still sold with two-prong plugs?

A: Numerous apparatuses have two-prong plugs since they are "twofold protected or double insulated."…

Q: The power dissipated is bigger when components are connected in parallel. True False

A: To determine   The power dissipated is bigger when components are connected in parallel - True or…

Q: How many electrons does 100 mAh represent?

A:

Q: Describe the potential of a conductor?

A: Definition: Electric potential or simply potential is defined as potential energy per unit charge.…

Q: What happens to the current in a circuit if a 100 resistor is removed and replaced by a 202…

A: we know that  according to ohms law   Initial resistance V= IR For constant voltage  I  α  1/R R1 =…

Q: A current of 6 A flows through a conductor for 2 s. What amount of charge passes through the…

A: Given : Current (I) = 6 A Time (t) = 2 s

Q: produces H joules of heat when connected to a source in a certain time. If it is cut into 2 equal…

A: We know that the According to Joule's heating effect, the heat produced is given as  H = V2tR here V…

Q: How many coulombs of charge pass through a lamp in 2 minutes if the current is constant at 750 mA?

A: GIven:            Time (t) = 2 min = 120 s                    Current (I) = 750 mA = 0.75 A    (…

Q: Your feet feel colder on a tile floor than on a wood floor at the same temperature because the tile…

A: Good conductor or bad conductor of heat mainly depends on how faster heat is being pulled out by…

Q: A current of 800 mA is passed through an electric lamp for one minute. Find the number of electrons…

A: Electric current is defined as the flow of charge. This flow of charge is due to the potential…

Q: Q30. what is the commercial unit of energy? O ev O kWh O W/s

A: Commercial Unit of Energy is KW-h

Q: What makes a material a better conductor than another material?

A: The conductive property of a material depends on how easily the electrons in it can move freely. The…

Q: A television of 100 W is used for 2 h, then what is the value of unit of expense of electricity?

A:

Q: An electric heater is made by applying a potential difference of 100 V between the ends of a…

A: Given that-Potential Difference, V= 100 VoltResistance, R= 20 Ω.We know that- heat generation rate…