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    Physics: Post your doubts here!

    To make a potentiometer, a driver cell of 4.0 V is connected across a 1.00 m length of resistance wire. a. a) What is the potential difference across 1 cm length of wire? What length of wire has p.d. of 1.0 V across it? b. b) A cell of unknown e.m.f E is connected to the potentiometer...
  2. T

    A levels Physics notes needed?

    To make a potentiometer, a driver cell of 4.0 V is connected across a 1.00 m length of resistance wire. a. What is the potential difference across 1 cm length of wire? What length of wire has p.d. of 1.0 V across it? b. A cell of unknown e.m.f E is connected to the potentiometer and the balance...
  3. T

    Physics: Post your doubts here!

    A car travels one complete lap around a circular track at a constant speed of 120 km/hr. Determine the magnitude of the displacement of the car in a time of 1.0 minute. (The circumference of a circle is 2πR where R is the radius of the circle.)
  4. T

    Physics: Post your doubts here!

    A 120 kg crate is dragged along the horizontal ground by a 200 N force acting at an angle of 30° to the horizontal. The crate moves along the surface with a constant velocity of 0.5 m s–1. The 200 N force is applied for a time of 16 s...
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    Physics: Post your doubts here!

    1. A metal ball is dropped into a tall cylinder of oil. The ball initially accelerates but soon reaches a terminal velocity. a. By considering the forces in the metal ball bearing, explain why it first accelerates but then reaches terminal velocity. b. Describe how you would...
  6. T

    A Question?

    1. A metal ball is dropped into a tall cylinder of oil. The ball initially accelerates but soon reaches a terminal velocity. a. By considering the forces in the metal ball bearing, explain why it first accelerates but then reaches terminal velocity. b. Describe how you would...
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