Two identical conductors of copper and aluminium are placed in an identical electric field. The magnitude of induced charge in the aluminium will be
zero
greater than in copper
equal to that in copper
less than im copper

The identical loops of copper and aluminium are moving with the same speed in a magnetic field. Which of the following statements true?

Two identical springs of copper and steel are equally strectched. On which more work will have to be done?

Statement-1 : The induced e.m.f. and current will be same in two identical loops of copper and aluminium, when rotated with same speed in the same magnetic field. Statement-2 : Induced e.m.f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.

Give uses of aluminium, copper and zinc.

Two identical loops , one of copper and the other of aluminium , are rotated with the same angular speed in the magnetic field . Compare (i) the induced emf and (ii) the current produced in the two coils . Justify your answer .

Name one chief ore each of copper and aluminium. Name the method used for the concentration of these two ores.

Two metal cubes with 3 cm- edges of copper and aluminium are arranged as shown in figure. Find (a)the total thermal current from one reservoir to the other (b) the ratio of the thermal current carried by the copper cube to that carried by the aluminium cube. Thermal conductivity of copper is 401 W//m-K and that of aluminium id 237 W//m-K .

Two metal cubes with 3 cm- edges of copper and aluminium are arranged as shown in figure. Find (a)the total thermal current from one reservoir to the other (b) the ratio of the thermal current carried by the copper cube to that carried by the aluminium cube. Thermal conductivity of copper is 401 W//m.K and that of aluminium id 237 W//m.K .