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Explain the electromagnetic induction, Explain the Electromagnetic Inductio...

Explain the Electromagnetic Induction The force exerted on an electric charge moving in a magnetic field leads to the idea of magnets being able to produce electricity as well

Work and energy, a person holds of hay over his head for 30 min and gets ti...

a person holds of hay over his head for 30 min and gets tired . has he done some wirk or not? justify your answer

Constraint relation : wedge and block, A block goes on a wedge which in tu...

A block goes on a wedge which in turns goes on a horizontal table, as given in figure. The wedge angle is Φ. As long as the wedge is in met with table, we have the trivial const

Electrons are emitted from a photosensitive surface, Electrons are emitted ...

Electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place by yellow light. Will the electrons be emitted w

What do you mean by total internal reflection, What do you mean by total in...

What do you mean by total internal reflection? State the conditions to be fulfilled for total internal reflection. Desfine the construction and working of an optical fibre. Sate i

Why magnetic poles are reversed at a given position, Why magnetic poles are...

Why magnetic poles are reversed at a given position on a deflection magnetometer to take readings? The magnetic moment of the magnet is 30 A-m 2 . Its length 10cm. What is its

Explain slip-ring, Explain Slip-ring Slip-ring (or phase- wound)  ro...

Explain Slip-ring Slip-ring (or phase- wound)  rotor having of a slotted laminated core of sheet steel. A three- phase winding is placed in the rotor slots. The rotor windin

Which bulb most efficiently changes electric energy to light, A manufacture...

A manufacturer of light bulbs advertises that its 55-W bulb, which produces 800.0 lm of light output, gives almost the similar light as a 60.0-W bulb with an energy savings. Th

Infra-red detectors and optic lens, Infra-Red (IR) Detectors:   An IR ...

Infra-Red (IR) Detectors:   An IR detector has an impedance of Z= (400+j200) ?  . During design  tests the detector  current  is measured  as  4  µA. What  is  the output v

Define the formula of wien law, Define the formula of Wien law. WIEN'S ...

Define the formula of Wien law. WIEN'S LAW: λ m T = constant Here: λ m = Peak Wavelength (m) T = Surface Temperature (K) Constant = 2.898 x 10 -3 mK It

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