Draw the circuit that could be used to investigate how the current through a filament lamp affects its resistance. How could it be used to investigate this? (6 marks)

*Circuit diagram showing a battery, filament lamp, ammeter and variable resistor connected in series, with a voltmeter connected in parallel with the filament lamp.*The resistance of the variable resistor should be altered to change the values of the current flowing through the lamp. For different values of the resistance of the variable resistor, the current flowing through the lamp should be measured with the ammeter and the voltage across the lamp should be measured with the voltmeter. The resistance of the lamp can be calculated using the equation R = V / I. The resistance of the lamp should be calculated for a wide enough range of different currents that would allow for a valid conclusion to be made, perhaps by plotting the current and resistance values on a graph and drawing a line of best fit.

Answered by Oliver B. Physics tutor

11016 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

A person swims from a depth of 0.50 m to a depth of 1.70 m below the surface of the sea. Density of the sea water = 1030 kg/m^3. Gravitational field strength = 9.8 N/kg. Calculate the increase in pressure on the swimmer. Give the unit.


Find the wavelength of a radio wave if the frequency is 11 x 10 ^6 Hz and the speed of radio waves in air is 3 x 10 ^8 m/s.


Sound waves are longitudinal. Describe a longitudinal sound wave.


What is the law of conservation of energy?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences