Generate Quiz 68BEE59336911

A radiation-detecting chamber is called a Wilson cloud chamber. It can see the passage of ionizing radiations because it contains a supersaturated vaporized liquid that condenses around ions or charged particles like protons, beta particles, and alpha particles. It cannot detect or trace uncharged radiations like gamma particles because it can only detect charged particles.

According to Oersted’s Law, a magnetic field is produced surrounding a metallic conductor when a constant electric current flows through it.

The right choice is B.
Since copper is a conductor and provides less resistance to the flow of charges, this choice is accurate.

Despite the emission of photoelectrons, no photoelectric current is generated because they are immobile or lack kinetic energy.

hv = W ( work function = hv0) +Ek where Ek =0 and v=v0

The energy associated with a metal’s threshold frequency is its work function. Albert Einstein explained the photoelectric effect using a metal’s work function. The work function and the incident photon frequency determined the maximum kinetic energy of the ejected electrons. K.E.max = hf – φ. The minimum bond energy or the bond energy of the surface electrons can be understood as the metal’s work function.

E-Vt = I

10-9 = 1V

V/I = 1/1 = 1 ohm = R

The temperature coefficient for conductors, such as filaments, is positive, meaning that as the temperature rises, there is a greater chance of electron-proton collisions.

At last, the resistance also rises.

A positive temperature coefficient indicates that as the temperature rises, the material’s resistance rises as well. This is true for the majority of metallic conductors, such as light bulb filaments. The positive temperature coefficient causes the filament’s resistance to rise as it warms up and reaches its operating temperature. Because of the positive temperature coefficient, the filament of the lightbulb has a higher hot resistance than a cold resistance.

The potential gradient has an inverse relationship with a potentiometer’s accuracy. A higher accuracy is indicated by a smaller potential gradient. We can decrease the potential gradient by lengthening the potentiometer wire because the two variables are inversely related. Consequently, the potentiometer’s accuracy rises.

Momentum is conserved when light energy transforms into electrical energy because light carries momentum like any other moving body.

Final angular acceleration minus initial angular acceleration/time equals average angular acceleration.

Angular acceleration on average = (5 rad/s-2 rad/s)/0.5sec

Average angular acceleration=6 rad/s2

Therefore, E is the right response.

Cp/Cv=1.7 and Cp=20, then Cv =20/1.7

11.76 J/Kmole

The efficiency formula is

W / Q1 = Efficiency

W = Q1 – Q2

100 is the work.

Q2 = 400 J

100 = q1-400

Q1 = 500 J

Efficiency = 100/500 X 100= 20%

Using Fleming’s Left-Hand rule, we would point the first finger from north to south in the direction of the magnetic field, so the answer is D. The second finger points in the direction of the proton, which in this instance would be the conventional current. The thumb gestures toward the force that would be outside the paper.

ΔU = nCV ΔT

ΔQ = nCP ΔT

Consequently, (ΔU / ΔQ) = (CV / CP)

The formula for monoatomic gas is (CP / CV) = (5/3)

∴ (ΔU / ΔQ) = (3/5) The first law of thermodynamics states that ΔU = (3/5)ΔQ.

Q = ΔU + W ∴ Q = (3/5)Q + W

∴ W=(⅖)

Since there is only one right answer for a numerical, none of the others can be.

The right response is D; neither of the choices is radioactive.

The periodic table’s highlighted radioactive elements are visible in the image.

The number of protons in an atom’s nucleus, or three in the case of lithium, is known as the atomic number (Z).

Some radioactive nuclei emit beta radiation, a form of ionizing radiation. Through a process known as beta decay, high-energy electrons, or beta particles, are released from the nucleus. In B-radiation, the electron does not come from a particular place inside the atom. As an alternative, it is produced when a neutron decays into a proton and an electron. A beta particle is created when the electron is subsequently expelled from the nucleus with a high kinetic energy.

Option D is accurate since:

The tension in the cord is as follows when the block descends vertically with acceleration g/4:

T=M(g-g/4)=3Mg/4

Work done by cord = F.S cosθ

The angle will be 180 degrees since the block is moving downward and tension is acting upward.

(3Mg/4)X(d)Xcos(180) = Work

Work Done= -3Mgd/4

Hydrogen isotopes are employed in the Sun’s fusion reaction. In particular, the isotopes of hydrogen that are involved are tritium (T) and deuterium (D).

Nuclear fusion is the process by which hydrogen and helium nuclei combine to form fusion in the Sun. The Sun gets its heat and light from this reaction, which releases a huge amount of energy.

Since the Sun’s fusion reaction uses hydrogen isotopes—specifically, deuterium and tritium—H is the right answer.

Lenz’s law states that the induced current flows in the magnetic field’s direction. Therefore, a higher induced current corresponds to a stronger magnetic field and vice versa.

In a vacuum, photons travel faster than in liquid water.

Photons move at the speed of light, or roughly 299,792,458 meters per second (186,282 miles per second), in a vacuum, like space.

However, because of interactions between the photons and the medium’s atoms or molecules, light moves a little more slowly in a material medium, such as liquid water, than it does in a vacuum. Light travels at about 225,000,000 meters per second in water, which is roughly 3/4 of its speed in a vacuum.

The medium’s refractive index, which measures how much light is slowed down when it travels through a substance as opposed to a vacuum, is the cause of this speed differential.