A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy
A condenser has a capacity 2 μF and is charged to a voltage of 50 V. The energy stored is
Options
(a) 25×10⁵ joule (b) 25 joule (c) 25×10 erg (d) 25×10³ erg
Correct […]
Physics
A common emitter amplifier gives an output of 3 V for an input of 0.01 V.
A common emitter amplifier gives an output of 3 V for an input of 0.01 V. If β of the transistor is 100 and the input resistance is 1 kΩ, then the collector resistance is […]
The electric vector vibration of an electromagnetic wave is given by
The electric vector vibration of an electromagnetic wave is given by E=(50 NC⁻1) sin ω(t-x/c). The intensity of the wave is
Options
(a) 2.3 Wm⁻² (b) 4.3 Wm⁻² (c) 3.3 Wm⁻² (d) 1.8 Wm⁻²
A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10⁻⁵ Wb.
A coil of 100 turns carries a current of 5 mA and creates a magnetic flux of 10⁻⁵ Wb. The inductance is
Options
(a) 0.2 mH (b) 0.3 mH (c) 2.0 mH (d) […]
A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity
A rod of 10 cm length is moving perpendicular to uniform magntic field of intensity 5×10⁻⁴Wbm⁻². If the acceleration of the rod is 5ms⁻¹, then the rate of increase of induced emf is
Options […]
Hard X-rays for the study of fractures in bones should have a minimum wavelength
Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. The accelerating voltage for electrons in X-ray machine should be
Options
(a) <124.2 kV (b) >12.4 KV […]
According to photon theory of light which of the following physical quantities,
According to photon theory of light which of the following physical quantities, associated with a photon, do not/does not change as it collides with an electron in vacuum
Options
(a) Speed and momentum […]
6Ω and 12Ω resistors are connected in parallel. This combination is connected
6Ω and 12Ω resistors are connected in parallel. This combination is connected in series with a 10 V battery and 6Ω resistor. What is the potential difference between the terminals of the 12Ω resistor?
A cell of emf E and internal resistance r supplies current for the same time
A cell of emf E and internal resistance r supplies current for the same time t through external resistance R₁ and R₂ seperately. If the heat developed in both the cases is the same, then […]
1 a.m.u. is equivalent to
1 a.m.u. is equivalent to
Options
(a) 1.6×10⁻¹² J (b) 1.6×10⁻¹⁹ J (c) 1.5×10⁻¹⁰ J (d) 1.5×10⁻¹⁹ J
Correct Answer:
1.5×10⁻¹⁰ J
Explanation:
No explanation available. Be the first to write the explanation […]