For the positive half cycle i.e., 0 → T/ 2, the diode D:
- Shows maximum resistance
- Behaves as open
- Is forward biased
- Is reverse biased
The expression for the emf produced by A.C generator is
- NωAB CosΘ
- ILB CosΘ
- NωAB
- NωAB SinΘ
Working principal of magnetic levitation train is according to
- Lenz law
- Max planks law
- Faraday law
- Ohm law
The quantity Δφ/Δt has the same units as that of
- Current
- Emf
- Charge
- Magnetic induction
The induced emf produced in the coil is sometimes called as:
- Back emf
- Mutual inductance
- Self-inductance
- Motional emf
Velocity selector will select only those charge particles whose velocity is given by:
- V=ExB
- V=0
- V=B/E
- V=E/B
According to maximum power transfer theorem, which of the following is the max power delivered by the battery to the output
- E^2/2r
- E^2/4r
- E^2/3r
- E^2/5r
Which of the following the fractional change in resistance per kelvin
- Conductivity
- Temperature coefficient of resistance
- Resistivity
- Temperature coefficient of resistivity
Which of the following is the longest wavelength of radiation for the Paschen series
- 187000000 m
- 0.00000187 m
- 0.00000187/ m
- 187000000/ m
In Compton effect, the incident photon when compared to the scattered photon is of:
- Equal energy
- Greater frequency
- Greater energy
- Greater energy and momentum
