Explore topic-wise InterviewSolutions in .

The answer is: (b) Clapp

The answer is: (c) Colpitts

Answer is  6r/5

Voltage is a form of Potential energy.

Work done by external agent in rotating the dipole

W = PE [cosθ₁ - cosθ₂]

then

W = PE [cos 0° - cos 180°]

W = PE [1 - (-1)]

W = 2PE

t = rF sinθ 

t = rF sin 0°

t = 0

h = 5

r = 2m

d = r/2 = 1 m

u = -10 m

\(\frac1f=\frac1v+\frac1u\)

\(\frac11=\frac1v-\frac1{10}\)

\(\frac1v=1+\frac1{10}\)

\(\frac1v=\frac{11}{10}\)

v = \(\frac{10}{11}\)

M = \(\frac{h_i}{h_o}\)

\(\frac{h_i}{h_o}= \frac{-v}{u}\)

\({h_i} = \frac{-v}{u}\times h_o\)

\(h_i=\frac{-10}{11}\times\frac{1}{-10}\times5\)

\(h_i=\frac5{11}\)

Both the statements are not valid.

When the object’s initial and final position is the same, the displacement can become zero.

The shortest measurable distance between an object’s original and final locations is displacement. It should not be higher than the magnitude of an object’s distance travelled. But it can be equal to the distance that the object moves.

(a) Displacement cannot be zero because the displacement of an object which travels a certain distance and comes back to its initial position is zero.

(b) Its magnitude is greater than the distance travelled by the object because the displacement of an object can be equal to, but never greater than the distance travelled.

please follow me ❤️

Here is the list of 16 Historical Places In Ahmedabad.

• Sabarmati Ahsram
• Kankaria Lake.
• Jama Masjid.
• Siddi Saiyed Mosque.
• Dada Hari Ki Vav.
• Akshardham Temple.
• Jhulta Minar.
• Calico Textile Museum.
• ISKCON Temple
• Lal Darwaza
• Lalbhai Dalpatbhai Museum
• Vaishnodevi Temple
• Hathisingh Jain Temple
• World Vintage Car Museum
• Tomb of Ahmed Shah and Ahmed Shah's Mosque.
• Bhadra Fort & Teen Darwaza

Top 10 Heritage Places in Ahmedabad. Ahmedabad is known for its quick and rapid growth for the past decade. When you go into the depth you will come to know about the history of this Pre-Mughal city. Situated on the bank of Sabarmati Rive it was one of the finest cities of Western India established by the king Ahmed Shah Badshah in the 15 th century

Top 10 Heritage Places in Ahmedabad. Ahmedabad is known for its quick and rapid growth for the past decade. When you go into the depth you will come to know about the history of this Pre-Mughal city. Situated on the bank of Sabarmati Rive it was one of the finest cities of Western India established by the king Ahmed Shah Badshah in the 15 th century

Sabarmati Ahsram Kankaria Lake. Jama Masjid. Siddi Saiyed Mosque. Dada Hari Ki Vav. Akshardham Temple. Jhulta Minar. Calico Textile Museum. ISKCON Temple Lal Darwaza Lalbhai Dalpatbhai Museum Vaishnodevi Temple Hathisingh Jain Temple World Vintage Car Museum Tomb of Ahmed Shah and Ahmed Shah's Mosque. Bhadra Fort & Teen Darwaza.

(c) Both 1 and 2 

The main objective of supercharging is to increase the power output but at the same time supercharger are used where weight and space are important like racing car, automotive engine, marine engine. So, supercharging is used to reduce space occupied by engine.

(a) The current will reverse its direction as the electron goes past the coil

Correct answer is (a) 2 ohm

(a) 80 x 10^-17 J 

Correct answer is (b) [L² T^-2 ]

Though the production of eddy current is undesirable in some cases, it is useful in some other cases. A few of them are

(1) Induction stove :

Induction stove is used to cook the food quickly and safely with less energy consumption. Below the cooking zone, there is a tightly wound coil of insulated wire. The cooking pan made of suitable material, is placed over the cooking zone. When the stove is switched on, an alternating current flowing in the coil produces high frequency alternating magnetic field which induces very strong eddy currents in the cooking pan. The eddy currents in the pan produce so much of heat due to Joule heating which is used to cook the food.

(2) Eddy current brake :

This eddy current braking system is generally used in high speed trains and roller coasters. Strong electromagnets are fixed just above the rails. To stop the train, electromagnets are switched on. The magnetic field of these magnets induces eddy currents in the rails which oppose or resist the movement of the train. This is Eddy current linear brake.

In some cases, the circular disc, connected to the wheel of the train through a common shaft, is made to rotate in between the poles of an electromagnet. When there is a relative motion between the disc and the magnet, eddy currents are induced in the disc which stop the train. This is Eddy current circular brake.

(3) Eddy current testing : 

It is one of the simple nondestructive testing methods to find defects like surface cracks and air bubbles present in a specimen. A coil of insulated wire is given an alternating electric current so that it produces an alternating magnetic field. When this coil is brought near the test surface, eddy current is induced in the test surface. The presence of defects causes the change in phase and amplitude of the eddy current that can be detected by some other means. In this way, the defects present in the specimen are identified.

(4) Electro magnetic damping :

The armature of the galvanometer coil is wound on a soft iron cylinder. Once the armature is deflected, the relative motion between the soft iron cylinder and the radial magnetic field induces eddy current in the cylinder. The damping force due to the flow of eddy current brings the armature to rest immediately and then galvanometer shows a steady deflection. This is called electromagnetic damping.

Correct answer is (b) its wavelength

Correct answer is (c) 400 V

So they have same mass, that means they will have same volume at same temperature. Now Suppose A cm² is the area of cross section of the pipe, so volume at 0^oC is
80×A 80×A cm³
and at 100C is
80.4×A cm3 80.4×A cm³
So change in volume is
dv=80.4×A−80×A=0.4×Adv=80.4×A-80×A=0.4×A
Now if γ is the volume expansion coefficient then we have
γ=dv/vdT=0.4×A/(80×A)100=5×10⁻⁵

\(^7P_n \div\,^7P_{n-3} = 60\)

⇒ \(\frac{7!}{(7 -n)!}\div \frac{7!}{(7 - (n-3))!} = 60\)

⇒ \(\frac{(10- n)!}{(7 - n)! }=60\)

⇒ \(\frac{(10 - n)(9 -n)(8 -n)(7 -n)!}{(7 - n)!}= 60\)

⇒ (10 - n) (9 - n) (8 - n) = 5 x 4 x 3

⇒ (10 - n) (9 - n) (8 - n) = (10 - 5) (9 - 5) (8 - 5)

∴ n = 5

Number of ways to arrange 6 papers = 6! = 720.

It is used to extract steel, which in turn is used as raw materials in various industries.

IRON ORE

Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the form of magnetite, hematite, goethite, limonite or siderite.

USES OF IRON ORE

The primary use of iron ore (98%) is to make steel. The remaining 2% is used in applications such as: powdered iron—for certain types of steels, magnets, auto parts and catalysts. radioactive iron (iron 59)—for medicine and as a tracer element in biochemical and metallurgical research.

In physics, an elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same. In an ideal, perfectly elastic collision, there is no net conversion of kinetic energy into other forms such as heat, noise, or potential energy. 

The correct answer is Adiabatic process.

• Adiabatic process
  • It is a thermodynamic process in which there is no exchange of heat from the system to its surrounding neither during expansion nor during compression, yet the temperature may change.
  • For the adiabatic process to occur, the system must be perfectly insulated from the surrounding.
  • A reversible adiabatic process is called isentropic.
• Isothermal process
  • It is a thermodynamic process in which the temperature of a system remains constant.
  • The thermal equilibrium is maintained because the heat transfer is very slow.
  • The work done in this process is due to the change of net heat content of the system.
• Isochoric process
  • It is a thermodynamic process which takes place at constant volume.
  • In such a process, the work done is zero. The volume of the gas remains constant.
• Quasi-static process
  • It refers to an idealized process where the change in state is made infinitesimally slowly,  such that at each instant, the system can be assumed to be at thermodynamic equilibrium with itself and with the environment.