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Why does the resistance of the metal filament inside the bulb increases as the potential difference across the bulb increases
Consider a voltage amplifier having a frequency response of the low-
pass STC type with a dc gain of 60 dB and a 3-dB frequency of 1000
Hz. Find the gain in dB at f = 10 Hz
Resistance x ohms, 50 ohms and 15 ohms are connected in parallel, the current through the resistor x is 2 amps and the total current taken from the supply mains is 15 amps. Find
a) the value of the unknown resistance x,
b) the p.d across the circuit,
c) the current in each resistance,
d) the total resistance of the current
A resistance of 10 ohms is connected in series with two resistances each of 15 ohms arrange in parallel. What resistance must be shunted across this parallel combination so that the total current shall be 1.5 amps with 20 volts applied? Draw a diagram
A resistance of 10 ohms is connected in series with two resistances each of 15 ohms arrange in parallel. What resistance must be shunted across this parallel combination so that the total current shall be 1.5 amps with 20 volts applied? Draw a diagram
A 100W, 250V lamp is connected in parallel with an unknown resistance ‘R,’ across a 250 V supply. The total power dissipated in the circuit is 1100V. Find the value of unknown resistance. Assume the resistance of the lamp remains unaltered.
A 100W, 250V lamp is connected in parallel with an unknown resistance ‘R,’ across a 250 V supply. The total power dissipated in the circuit is 1100V. Find the value of unknown resistance. Assume the resistance of the lamp remains unaltered.
Two coils A and B are connected in series across a 110V, 60Hz supply. The resistance of coil A is 2 and inductance of coil B is 0.004H. If the input from the supply is 2.4kW and 1.8kVAR, find the inductance of coil A and resistance of coil B. Also calculate the voltage across each coil.
A battery of emf 12v and internal resistance 1.5 ohms connects across a 10 ohm resistor.
Calculate the current of the circuit
Calculate the terminal voltage
A wire has a diameter of 5mm, length 50m, resistivity 3.2 x 10^-8 ohmsm. What is the resistance of the wire?
