Consider the circuit diagram below. The internal resistance of the battery and anyresistance in the wires can be ignored.
A SQUARE induction coil with a side length 3 cm and 400 windings, is placedperpendicularly in a uniform magnetic field and then rotated through an angle of 45ºin 0,08 s. An emf of 7 V is induced in the coil. 11.1 State Faraday’s law of electromagnetic induction in words. (2) 11.2 Calculate the change in … Read more
Two points, P and T, are situated 3 mm apart in the electric field of positive charge Q, as shown below 10.1 Draw the electric field pattern around charge Q. (2) The magnitude of the electric field at point P is 4 x 106 N·C-1 and at point T themagnitude is 2,5 x 105 N·C-1. … Read more
A small isolated sphere A, with a mass of 0,2 g, carrying a charge of +7 x 10-9 C,is suspended from a horizontal surface by a string of negligible mass. A secondsphere B, carrying a charge of -8 x 10-9 C, on an isolated stand, attracts sphere A sothat the string forms an angle of … Read more
The gravitational force on a probe, called Curiosity, on the surface of Mars is 3 338 N.The radius of Mars is 3 390 km and the mass of the planet is 6,39 x 1023 kg. 6.1 State Newton’s Law of Universal Gravitation in words. (2) 6.2 Calculate the mass of the probe. (4) 6.3 Calculate … Read more
A crate, with a mass of 25 kg, slides down a plane which is inclined at 15º to thehorizontal. During the first part of the motion, from A to B, there is no friction betweenthe crate and the plane, but part BC has a rough surface. 5.1 Draw a free-body diagram of ALL the forces … Read more
Learners investigate the relationship between the mass of an object and theacceleration it experiences when a constant net force is applied on the object. Theyuse their results to draw the graph below. 4.1 State Newton’s Second Law of Motion in words. (2) 4.2 Calculate the gradient of the graph. (3) 4.3 Hence, determine the net … Read more