فزکس کے نمریکل کا تعویز
پوری کتاب میں سے صرف 10 نمریکل کا تعویز
Important Numericals
1) A power line 100 m high carries a current of 200 A. Find the magnetic field of the wire at the ground.
2) A solenoid 15.0 cm long has 300 turns of wire. A current of 5.0 A flows through it. What is the magnitude of magnetic field inside the solenoid?
3)An ideal stepdown transformer is connected to main supply of 240 V. It is desired to operate a 12 V, 30 watt lamp. Find the current in the primary and transformational ratio.
4) A solenoid has 250 turns and its self inductance is 204 mH. What is the flux through each turn when the current is 2 A? What is the induced emf when current changes at 20 A/s?
5) Find the value of the current flowing through a capacitance 0.5 μF when connected to a source of 150 V at 50 Hz.
6) A 1.0 m copper wire is subjected to a stretching force and its length increases by 20 cm. Calculate the tensile strain and the percent elongation which the wire undergoes.
7) Calculate the gain of an amplifier in which collector resistance RC is 5 kΩ. The input resistance between the base and emitter of a typical resistor is 2.5 kΩ and value of its β = 100.
8) What is the mass of a 70 kg man in a space rocket travelling at 0.8C from us as measured from the earth?
9) An electron is accelerated through a potential difference of 50 V. Calculate de Broglie wavelength.
10) What are the energies in eV of quanta of wavelength: λ = 400, 500, 700 nm?
Edu Skills 360
